Basically what the title said
My case is segotep sg-l2b, I have two front fans and one at the back.Yes, you can install it and it will work, up to a point.
A very low point.
To unlock the potential of your new processor, you need good cooling.
That requires a case with good intake airflow as well as a much more capable cooler.
What is the make/model of your case?
I might suggest a noctua NH-D15s
https://www.emag.ro/carcasa-segotep-polar-light-minitower-fara-sursa-negru-polarlgh-bk/pd/DGFDN2BBM/ This is my case. Also, do you think I should try to upgrade my cpu cooler and CPU myself or give it to a technician? I've never done it before and I'm afraid I might mess something up.I can not find that model on the segotep product page.
What you are looking for is 160mm available height so you can install a good twin tower cooler.