hey guys i have an issue with my 1.6 petrol BGU engine, manual and i need your help and input.

the problem is that at idle the engine irregularly, which can be felt throughout the cabin, seats, pedals and wheel. it is a bunch or weak jolts with some very harsh jolts in-between.

from what i have read it could be a flywheel which is a very expensive fix.
i am also having starting problems at times when i start the car, cranks over a few times but doesn't start so i turn the key off and try again and it fires up prefect.

any advice guys? could it be a flywheel or anything else?

Thank You