I am doing this as a little side gig in preparation to buy a engagement ring for my girlfriend! Any tips or suggestions? I'd love to do as many as I can around my work schedule. Thanks and cheers to you all!

Welcome to the forum.

What a great idea, Zak! Since you have a full time job, I suggest that you organize the shops along a route. ie. the route home, the route to stores you frequent etc.

Congratulations on the big step Zach! I recently got engaged too :)

Here are some tips and suggestions (for secret shopping, not for the ring, lol): https://www.secretshopforum.com/thread/1/2/94/pro-tips-for-those-who-want-to-be-the-best-shoppers#post528