What is the best way to guarantee no boot loops after rooting android 7 tecno tablet?

I have located a firmware package of my tablet brand. It also has the same build number. The variant number is also identical to mine. I extracted the zip file and got a boot image. Now reassure myself all was going to be ok; I tried to open it on win 10 PC. The PC, responded with an error message. "The file is corrupt." I have not installed it and am hesitant to use it. Thus, my question above. I intend to use ADB to and Magisk. I have no recovery TWRP for my build and brand tablet.