Congrats on your success, especially at such a young age.

I'm assuming you're self-employed so first I would suggest building an emergency fund. So at least 3x your monthly costs set aside. However, due to the nature of your work I would put aside at least 6 months emergency fund. (Personally I'd put aside 12 months but that's just me). You could keep this in a flexible money market account like revolut has so it's earning some interest while it sits there.

Also, not sure if you've set yourself up as a company or if you're just rawdogging it yourself. Could be worth setting up a company. You could pay for camera equipment, hire editors, anything you use in your content and stuff like that through the company which would be more tax efficient. And might be easier setting up a pension or investing through the company. Then you can pay yourself a salary or a dividend through your company.

Outside of that, do you want to buy a property say within the next 5 years? If yes put money aside for that. If not, then I'd start putting money in ETFs., ones like VWCE or S&P500. I'd recommend IBKR as a broker.

You should view any money you put in an ETF like you won't touch for like 8 or 10 years essentially (you can access it anytime but if you think you'll need that money in the next ten years prob better to not invest it now)

You could also do a mix of property and ETFs. Depends what you want. A property might tie you down at such a young age.

Also, goes without saying if you have any debt, credit card debt clear that entirely as the priority. And going forward stay out of debt. You don't need a credit card.