For the gallery research you may want to learn about something other than Top Arts. It has a different set-up to most exhibitions so it can be difficult to write about it. It's not really representative of how the professional art industry works. Also, a lot of people write about it because it's the only exhibit they've visited. I remember my teacher last year telling the class not to write on Top Arts in the exam unless we had no other choice.
Some of the things you should consider about the galleries and exhibits:
- the type of gallery (commercial, public, artist-run, online, other)
- how it is funded (government funding, sales of artwork)
- who works there (curator, art historian, etc & their names)
- who decides what gets displayed & other big decisions
- how work is selected
- does the gallery own collections permanently
- how much storage the gallery has
- how much does it cost to run the gallery
- what preservation considerations there are (lighting, air conditioning, temperature control, protective glass)
- priorities/purpose of the gallery (education, profit, entertainment)
- how is the exhibit arranged
- are there rules for visitors (no touching artworks, no food/drink)
- is there an overarching theme to the exhibit
- are all the artworks the same medium
I might have forgotten some things. You may not be able to find all the information from some galleries but if you ask someone who works there they may be able to answer some questions.
Hope this helps