old phone too old to transfer data

edit: I got the new phone in today and had no trouble transferring data! thank goodness!! IDK why he thought it wouldnt work but who cares because it did! yippeeee!

I'm getting a new phone next week, and my current one hasn't had an update in A WHILE so the guy at the store said there was no way to transfer the data directly. I'm fine with doing things manually, considering the old phone is sort of riddled with virus-y stuff. I'm mostly wondering what the best course of action is? or if anyone has any efficiency recommendations. tysm!

I figure I'll use google drive to move my pictures and documents (i also don't really want to plug the old phone into my computer because of the aforementioned virus-y stuff), and manually download apps i want to use. I'm curious if there's a good way to do contacts. I'm thinking it might just be a good reason to do a purge on my contacts list but still doing it all manually will be somewhat daunting. and I'm sure i'm forgetting some things. I'm not trading in my phone (again, too old) so I'll be able to take my time transferring things.