Help! Kindly

I am quite a newbie, trying to install...what should I do when it says
"For these builds, I recommend downloading the latest Global Stable firmware to ensure compatibility with the used blobs:
Well, I download this file but it is just 50 mb...should I download also the complete 1.5 gb file (fastboot rom, .gz?) and flash the V11 fw?
Or do I flash just this V11 52 mb file directly on my Andoid 10 stock?
Also, it says "Flash LineageOS ONLY with LineageOS Recovery"....is it me or I can't find recovery for A2 lite on the itsvixano page?
Also, if there is no Lineage OS recovery, what recovery should I install? TWRP?
UPDATE: I was able to flash the firmware zip...but the next step that says "Sideload the LineageOS zip we downloaded before." it gives error " failed to find update binary meta-inf/com/google/android/update-binary ". ANy idea?
UPATE: I was able to install evething, good mod! Only one doubt: I have flashed MAGISK, how can I remove it and restore Lineage boot img?