That was "The Lost Years" by JMD and it's a good YA series about a young drifter but just isn't you know a story of a superhero protagonist.
In publication history, Miguel O'Hara aka Spider-Man 2099 debuted in 1992 and he is Spider-Man's first legacy hero.And he was, historically, the first second Spider-Man.
If you define "first second Spider-Man" narrowly in terms of first person other than Peter who wore the Spider-Man costume than that's Hobie Brown/Prowler in ASM#87.
If you mean "First Clone" of Peter...well okay yeah that would be Ben Reilly I guess. But if you want to claim being cloned then it must be pointed out that the clone version of Ben was killed by Green Goblin, and the one we have now is a series of clones of Ben Reilly, i.e. copy of copy. So the version of Ben Reilly in Beyond isn't even "the first Ben Reilly", lol.
Well the other intepretation is that Bruce being that he's a first class a--hole and possessive jerk knew that Dick Grayson would be better than him, so he deliberately picked a guy who would mess up to be his successor so he'd come back in grand style.They made it a point that Bruce wasn't in a good place when he nominated Jean Paul Valley and part of why he did it is that he didn't want to saddle Dick with the burden of being Batman, a burden that frankly Dick still doesn't really want because he can't be Batman like Bruce can.