No worries

It's ok to have the website as a source, but also say that you've checked it in person.
I think it's ok to look at a website for a route, then go and confirm it in person and then add it.

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Thanks for keeping this bit up to date.
On here: way/155081015
you've left lots of tags relating to the car park. Also, this overlaps with the other park in this position. Perhaps this should be removed and the outline of the other park adjusted.
And does Playhouse Square really go through the park like that?

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Thanks for adding this, good to have up to date details on things like this.
The point you've added is very close to Virgo, are all the locations of the shops there correct? Are they all still there?

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From aerial imagery it looks like it might be better tagged as a residential road than a minor/unclassified road.

Hi, you requested a review of this, it all looks good to me/

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Is there something there now instead, or is the shop just vacant?
If it's vacant then you could have changed the point (or now just add a new point) and set it to shop=vacant, to show that.

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I think the copyright on that website means you can't just put things from there into OSM without checking if it exists in person. So if you go and do a survey and find signs on the ground for this, then it's fine to add, otherwise it should be removed.

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Looks good, thanks for adding this, and it looks like you've put good detail on the gate too.
Just a note, the colour should be all lowercase "black", not "Black". I've been in and fixed that for you here.

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Thanks for adding these paths, and looks like you've mostly added lots of good detail to them too.

Just a note about access. It doesn't have to be set for all modes of transport on all roads and paths as a lot of things are implied.
If general access is set, that is implied for all other types of transport, so only anything different has to be set. For things like paths, access for cars/vehicles doesn't need to be set to no because that's implied by the fact that it's a path.

Your canal side path connected to the woods in a couple of places, so I've disconnected that for you.
Also here: node/5353674577 the path you've drawn stops (well it connects to an abandoned railway). If it in fact connects to the path to the south then you should add that too.
And "Leeds and Liverpool Canal - Woodland" seems like an odd name for a path, if that's what's on signs there then that's fine, otherwise maybe it should be the description.

Also, it looks like your changeset comment got cut off a bit. It doesn't have to be really long, just a brief description of the changes you've made and perhaps why.

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What you need to do here is add a point on the road where you want to split it, then right click on the point and select split (the scissors icon). Then you can change the properties of each section separately.

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Here the name is (and should be) tagged on the outline of the whole school area, not on the buiiding.
This is the outline: way/281765046
This is the building: way/281765048
I've put the name on the outline here (and removed it from the building), but it looks like things like the website might need to be updated too, so do change that if you know what the website is now.

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It mostly looks good to me. The postcode should be capitalised and in opening hours it should just be "Sa", not "Sat, I've fixed those things for you.
Also you've listed a lot of things under cuisine, it's normal to only have one or two things there.
I think "sandwich" covers a lot of what you've put in there (that would be used for Subway for example), see here for common values: cuisine=*

Ah ok, and is there connection to it from the roads it goes near?

Great stuff!

Simply select the house and then add details in the address field.
The key things are house number (the 123 box), and/or name if applicable, the street name and the post code if possible.
The city is optional because that can be implied from other boundary data in OSM.

That makes sense, fair enough, just double checking