My Macbook fan is running kinda strange

I would advise you to uninstall CCleaner. Anti-virus apps, cleaning/optimizer apps, and third party security software are not needed on a Mac. These types of apps usually causes more problems than they solve since they interfere with the normal operation of macOS. In addition, CCleaner is now owned by a different company, Avast which also makes an anti-virus app. CCleaner has been compromised at least two times, and Avast has been known to sell user information on multiple occasions. Avast is not the company it once was either.

See the section at the end regarding the malware infection of CCleaner:

https://en.wikipedia.org/wiki/CCleaner

https://arstechnica.com/information-technology/2017/09/ccleaner-malware-outbreak-is-much-worse-than-it-first-appeared/

Avast selling user information:

https://arstechnica.com/tech-policy/2020/01/avast-kills-off-jumpshot-the-subsidiary-that-sold-all-your-web-data/

macOS already has great built-in security especially when the user also practices safe computing practices such as those outlined in this excellent article written by a respected forum contributor:

Effective defenses against malware and other threats - Apple Community

After uninstalling CCleaner and any other anti-virus, cleaning/optimizer apps, or third party security software...if you still have issues, then run EtreCheck and post the report here so we can examine the report to see if anything stands out.

FYI, the USB-C Intel Macs do run hot and is perfectly normal for those laptops. These USB-C Intel Macs will not speed up the fan until the system temp gets to over 95C and will keep the temps in the 80C to 90C range if possible. Just about everything you do will have the CPU temp jump to 80-90C, even just moving the mouse pointer. I personally like to use MacsFanControl when I monitor the computers I'm diagnosing.

If a Mac is running overly hot with the fan(s) running at high speed when you don't seem to be doing much, then it is usually due to some app running out of control (usually a third party app such as those I have already mentioned which interfere with the normal operation of macOS).

It is not worth using a fan/temperature monitoring app except to learn about how the computer works.

If you feel there may be an issue with the cooling system, then run the Apple Diagnostics. The diagnostics are usually pretty good at identifying any cooling system issues if any exist.