Need help installing custom ROM

Currently I have a Redmi Note 10 5G (codename camellia/n)

This is a very low end smartphone. And a very important problem has to do with it. MIUI is not great. I just don't like the optimizations they do by just killing any process I have in the background ruining the experience of use. And it falls behind others when it comes to personalization which is very important to me.

I want to install crdroid which is one of the few roms which are available for my device (at least officially). But I have many problems.

First, I need to do all of this without root and without any custom recovery as my phone doesn't support any. I am going to install the ROM through Xiaomitool V2 because it makes the process a lot more intuitive and easy at least for me. (I have absolute 0 knowledge on adb).

Then there's Gapps, I need to flash them as I rely on them a lot and I also need it so I can restore the google one backup once I install the ROM. But without a custom recovery I have no idea how to do it.

Last, please give detailed instructions. I have no idea how adb (which I suppose is the only way to do what I'm trying) commands work, what each of them does etc

Sorry for the long text and thank you.