Good for you, FF7R is fantastic and I think its a very good entry point for the franchise. The combat is great, however it became "divisive" is beyond me, I have played almost every FF game there is and FF7R's combat system is probably my favorite.
As for what to follow it with, the easiest recommendations are 7, 8, 9, 10 and 12 since they are available in current consoles, but I'd say ignore that and play 4 and 6 first, and if you feel like it even 5, you could... ehem, emu- play them in PC. There are common tropes/elements repeated throughout the franchise, and personally I feel playing the early entries gives a better appreciation when they are adapated to the latter entries. I'd ignore 1 and 3 because they are the most generic and by today standards I'd say they dont stand out particularly well, and FF2 is the absolute worst. Dont even bother with it.
After that I'd go 7, 9, 10 and 12. In between give 8 a chance even if its junction system it uses is massive crap. 10 was the first with voice acting so keep in mind it has aged very badly and the dialogue as a whole is very cringy throughout the whole game. I'd say leave 13 and 15 last, not only because they are the most divisive, but because I feel their characterization and story are rather weak IMO, I personally get very stressed with the writing and characters of 13.
But bad points aside, they all got virtues and I wouldnt say any one of them is a legit bad game... except for FF2 maybe.
Havent played 11 or 14 so I cant say much about them, but FF14 seems to be very popular
At the end of the day everyone has very particular opinions when it comes to this franchise, its usually very divisive, so, you know, you gotta try them all.
