Without rehashing what others have said, I would highly recommend reading through the steps *and* the comments for each before tackling your replacement for tips. Highlights for me were: only disconnecting what actually needed to be disconnected, rotating the spudger to release the track pad cable, a hair dryer worked perfectly fine, and the pencil outline of the battery before you remove. You got this!
I did this as suggested and it was much easier than disconnecting entirely
I did this after reading your comment and it worked incredibly well!