Hello, new hobbyist in need of advice

I think focusing less on the mechanical bits and more on the player's experience provides a great filter for design decisions. Like what interesting dilemmas will the players face using an aperiodic tiling system? What's the middle of the game feel like? What sub-goals are players trying for? You can write out a narrative description of how the ideal game plays without the mechanics, then see what mechanics fit. For prototyping, use index cards and just start putting stuff on them. Cross out something that doesn't work and replace it with something better while you solo playtest.

I'm very much in the same boat but have found that just going with your instincts work best. If you're having trouble on a game idea but have inspiration for another just work on the other one. A lot of ideas sound great on paper or in your head but in reality they just aren't very fun so there's no reason to force it. I've made a couple of prototypes for games and have redesigned them multiple times but at the end of the day they just aren't very fun.

I think it's a lot of trial and error, make it a functioning game first and then go for the unique mechanics of it. I am a musician as well and there are songs I strain over trying to make it work or make the "perfect" song but it just doesn't happen and sometimes I pick up the bass and a song just comes out. If you don't feel confident in a prototype don't go into it, make a prototype for a game you have figured out further along. Just getting the practice of prototyping less exciting games will help you with your better ideas.

For insistence I have an idea for a detective type game involving many cards and game mechanics but get stuck on many parts of it, so I leave it alone until inspiration strikes and then I jot down the idea. In the same time I have another game about record collecting that I figured out a basic game for and will print out cards for prototypes to test out. Some games just take a while, don't force it.

The first prototype is in your head, if you can play it out in your head then it's easy to make the pieces for it. Index cards are great as previously mentioned but also buying some $1 pack of playing cards is really good too. Take a sharpie and go to town, now you have a viable deck of cards that can be shuffled and played with. You'll be making a lot of changes to your game before the prototype, during the prototype and after the prototype. So for your luchador game take a deck of cards and draw the suits you're using on them and then make some for the movement as well. If you need some inspiration for sizes I would check out www.thegamecrafter.com for the prices and sizes they offer. This will give you some idea of what can be printed realistically as well and how other games use those cards. Also cut out some practice sizes out of poster board and play around with them, you'll eventually get a strong feeling about one of the sizes.

Don't think you have to rush into a physical prototype. There isn't much to making a prototype, the hardest part is designing a functioning game first and this happens between your pen, paper and mind. If it works in your head then start making game pieces and soon enough it becomes the prototype. Don't stress over one game idea though, keep your mind open to new ideas and jot down those ideas.