How do I prevent lags and crashes?

I play Minecraft on the laptop, but it often lags and with some blocks it is the case when I run over it or they try to break down the game crashes. Would be nice if someone could give me tips.

PS: I have already reduced FPS and exposed the clouds

Should you best buy a PC for gambling?

Can you reduce the resolution? Keeping sight down always helps. Decrease all graphics settings.

And look, that the laptop is not in the energy-saving mode but on maximum performance.

Optifine can help, it also offers many more settings that can relieve the PC.
All forms of particles can cost a lot of power.
The visibility you should keep as low as acceptable to you.
Use resource packs with low resolution and few details.
Make sure you do not put a lot of items around in the game and do not keep too many animals / mobs near you, as both will cost you money.
Of course, complex Redstone circuits and machines also demand performance, especially when running permanently.

If you play on a server, but also your Internet connection can be a problem. Then you can't do much, except to throw out the others in the network or to provide better management.

If your notebook is generally very slow, but you have a good internet connection, it may be better to play on a server, because then it takes over the calculation of many things and thus relieves your PC.

PS:

Reduce FPS does not bring anything. If I understand you correctly, you have only lowered the FPS upper limit, but it's only worth it if the FPS fluctuate very much.

So all I can say is that when I realize that the laptop is super hot, I will put it aside or turn it over so that the air escapes better. That always helps me so he does not lie there