I got a pristine Olympus OM-1 today.

I've been doing digital photography for few years now but I always wanted to try film photography also, so I've been lurking on this subreddit. Yesterday, I saw an ad in Facebook marketplace selling all of this for $85 so I contacted the seller and bought it the next day. From the prices I have seen online, I think I got this for a bargain.

The last time I shot a film was when I was kid. My mom let me use her canon slr in auto to take photos for the family. Any advice and things I should check will be much appreciated.