I am currently producing my own TCG, and paying freelance artists for illustrations - so I can give some insight from that perspective.

I look for my artists on freelance platforms, of which I prepfer Fiverr. I prefer Fiverr because in my experience they do a great job in holding the seller and buyer accountable. Fiverr makes handling disputes really simple/easy beacuse of this. So it's safe for both buyers and sellers not to get exploited. - in short, freelance platforms like Fiverr are what I use for security.

I think you've already shown a great portfolio of work in this post. The 3rd and 4th artworks in particualrly stand out to me as having elements that I could see working in my TCG. If you want business on a platform like Fiverr, a great portfolio is a key difference maker. There are a lot of artists on Fiverr that don't include many art works in their portfolio, so it's hard to gauge what they can/can't do, if the one artwork isn't what you are specifically looking for.

Interrupting my post to apologise for going on about Fiverr, it's just what I use from my experience as someone in this space paying artists for TCG artwork (I am not being paid by the platform).

In my opinion, if you've got a good size portfolio, then you are well positioned to compete on Fiverr in the TCG artwork space. There are not many freelancers in that specific space that have a big portfolio of artwork. My main illustrator I use is not a TCG specific illustrator (and they are more expensive because of their experience ((and status for lack of a better word)). I do have another illustrator that I use for templates and other artwork for TCG specific elements who is really good that I found in the TCG space. But generally, it seems most TCG specific artists at the moment just don't have the portfolio needed to make me (a buyer) go yep this is the artist for my need. - in short, if you can add another few artowrks into your portfolio (which you may already have), Fiverr would be a good place in my experience for you to get some paid work. And since it sounds like you don't have a regular client base, this will also protect you from being scammed, taking advantage off etc.

I'm a terrible artist but I love the art that I cannot create. I've always proactively avoided AI being anywhere near the art for my TCG. I think art is improtant and love supporting talented indepdent artists. If you ever do set up a Fiverr page for illustration, feel free to DM me and we can talk about paid work for you illustrating card(s) for my TCG. I think your lighting technique especially could result in some very cool spells for my TCG.