From my own experience of getting into poker again after a while off, the best advice I could give is probably: Don't try it on your own. This means two things:

1) Get engaged with high-quality and up-to-date (!) teaching material where coaches with credentials introduce you to modern poker strategy rather than trying to figure things out for yourself. For myself, The Grinder's Manual from Peter Clarke as well as his From the Ground Up course here on RIO work really well. Absolutely worth every penny!

2) Get a network of people and poker friends around you that share the same goals. So: Search for study partners, contact people actively, join Discord groups, study together, do some live sweat sessions etc. etc.

I'm rooting for you!

Its def not a big sample, but you will find some mistakes in your sample for sure, not only bad beats. I agree with @whiteshark. Watch videos, talk hands, do session reviews and dont take to much time looking at the big pots where you you ran with AA into a set. Look at smaller/medium pots where you should bluffcatch and you folded or where you could bluff, but checked. In this kind of spots you gain or lose a lot of ev. I'm losing at 25nl on a bigger sample than yours, but the key is to never give up and always try to improve your game.

Get someone decent to rview your sessions. Thats the lowest hanging fruit.

Hello Beyaz, good to see you.
I too am a returning player after some years away and I'm finding it extremely difficult to grind out wins after my first 10k hands.
So starting today, I will be working my way through the RIO Getting Started Learning Path, accompanied by Pete Clarke's From the Ground Up Cash course. To start, I'll be consuming 45-60 minutes of content only alongside taking brief notes of key learning points, as if I exceed that, I tend to drift off or forget the principles learned at the start of the session.

I think anyone returning needs to be careful about how far and wide one casts the net when looking to relearn the game and understand how it has changed in our time away. It seems there is now an infinite possibility of places to learn from, and a larger than ever pool of trolls happy to give some advice (however valid that advice may be). I've been muddling around for weeks since firing back up, however I think a community like RIO is a good place to start.

I will let you know how I get on with the Learning Paths, and would welcome people's experiences of the FTGU and the Learning Paths too.

If there are any active discords already setup for newbies and <25nl from the forum, I would appreciate someone to link me up.

Finally, if anyone out there is in a similar place to me or wants to join me on this journey and do some study review sessions etc, feel free to get in touch.

First fundementals
Second Revisit it
Third Mental game