Looking at adding a 1060 GTX 6gb to existing setup but confused if this would be a viable option?

So I've spent a solid 2 days researching, reading and watching everything I can to start mining as more of a hobby than anything too serious as l want to see if it's something I'll do long term.

There is a lot of confusing information and I've gone round in circles trying to get a clearer picture. I currently have a Dell Optiplex 7010 SFF running an i5-3470 Quad @ 3.2ghz and 16gb ram. I decided due to my budget I could afford a used 1060 GTX 6gb as it still appears to be a reasonable entry level GPU for the altcoin I'd like to mine (Grin).

I was also looking at a Nebra/HS1+ rig but they are sold out. Do you think it would be better to wait to drop 300 on a Nebra which really interests me or the HS1+ or use my existing setup with the 1060?

I'm also well aware I'm not going to be making serious cash.