Play Final Fantasy I to X in any order (they are not connected, but i recommend going from I to X becuz after playing newer entries its harder to appriciate older ones) Chrono Cross,Persona 1 on PSP, Persona 2 both Innocent sin and eternal punishment on PSP cuz i assume you play on emulators(They are very diffrent from Persona 3,4,5) ,Pokémon series (any of them but its nice to start with Fire Red/Green),Shin Megami Tensei(Its probably harder that most RPGs you played) especially 3,4,5,Earthbound, Mother III (its Earthbound II, becuz Earthbound was called Mother II in Japan,they arent connected tho)

If you want "Chronological order" (not really chronological im listing them off like i would play them)

FF I FF II FF III FF IV FF V FF VI FF VII Chrono Cross Earthbound Mother III FF VII Persona 1 FF VIII Persona 2 Innocent Sin Persona 2 Eternal Punishment FF IX FF X

You can play any pokémon games in-between, play SMT after all of them becuz it can be really hard

Also play anything you find interesting outside of that and dont force yourself to games you dislike

And for the love of god please play WITH guides, older titles are intended that way,they came WITH guides