I’ve got about $75 in Amazon gift cards to spend and 2 things I need include a range finder and a spotting scope.

I’m thinking a $75ish spotting scope isn’t a good investment, but what about the range finders in that pricing area? Are they decent enough?

Following, as that's one of my difficulties, estimating distance.
I passed on a Nikon Golf rangefinder last year, it didn't have rave reviews, but fit the OP's query, at about $100 more.

When it comes to glass, you get what you pay for, afaic. Don't have to have the most expensive ones, but one should never go cheap.