Okay so you're new. Welcome. First thing I'm gonna tell you is stop overthinking it because that's the number one thing that trips beginners up before they even place their first move.You do not need a genius strategy you found at 2am, five different expert channels giving you contradictory advice, or twenty tabs open comparing everything at once. You just need one platform that doesn't make your head hurt, small stakes while you're finding your feet, and a bit of patience to actually learn the flow. That's genuinely it.
For platform I'd point you straight to Mostbet
https://mostbet.fi/ because it's clean, easy to navigate, and doesn't throw a hundred things at you the second you log in. Start with sports you already watch and understand. Football, basketball, whatever you actually follow in real life. That knowledge is already an advantage and most beginners completely ignore it.
If you want to explore the gaming side too it's all there, just set yourself a limit before you start and not halfway through when your brain starts doing that creative math thing. We've all been there. Don't be that person.
Good luck out there!