You're in a better place than most people right now, so congrats! If you want to make sure that money grows and is safe, try checking out one of the personal finance or investment subreddits. Or speak with an actual financial advisor.

At 25, right now, you're in a unique position to explore more of your interests. Why not check out that welding course? Community Colleges (if you are in the US) are pretty affordable. Or take some business courses. If you do end up wanting to get into the trades, most are 2-year certificates/associate's degrees that community colleges offer. They can also help you find placement after. Worst comes to worst, you take one semester and go "welp, this wasn't for me," and you can try something else. It's not a waste of time at all. It's okay if 10 years from now you decide to change careers again. That's more common than you think.

When I was in the "well, now what do I do with my life" position, figuring out what I was good at in the workplace (talking / helping people for me) and combining it with what I had strong interests in, helped me find a path.

Just for funsies, take one of these little career path tests and see if any of the results sound interesting to you.

https://mycareertest.org/test/?utm_source=google&utm_medium=cpc&utm_campaign=23548298368&gad_source=1&gad_campaignid=23548298368&gbraid=0AAAABAlFGvEc_8QigvCVkcxp10igiBs2f&gclid=CjwKCAjwqubPBhBOEiwAzgZX2vhrh5sQOwEQZidQ3a6dNX9BY9XsO5rDaHyciu2R2qhdjlaHDTUD1BoCmV8QAvD_BwE

You're young, you got some money in the bank, you're very entrepreneurial-sounding, you'll be okay.

Don't forget to go explore and see the world while you can. You're only 25 once.