im a little bit confused about porting devices ... need some help

hey everyone, this is my first post here so wish to be welcome from you all friends

i like my phone to be always secure so i tried always to not use the stock rom that contains the Gapps ... and after further searchs i found that thers is many projects that dont even use android as OS and that they use Linux distributions or things like that ... i have a tablet samsung SM-T113 and another one SM-T116 both of them have different...

im a little bit confused about porting devices ... need some help

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