I feel like there aren't enough variations of many openings, for example I feel like there needs to be a lot more studying of the english opening. but there is hardly any
now first of all.
Technically there is Any legal move in these openings and some are playable (but not positionally strong).
second of all, positions multiply as the opening unfolds, and so does the possibility that you will find or make a legitamite blunder.
lastly, if you're trying to memorize stuff (espacially deeply). I wish you well. but I'm sure you're doing it all wrong. as said many, many,many times- being great at tactics is far better use of anyones time.
you don't have to play what the masters play!
(now the secret it out) but if you play hokey, pointless moves you're not doing yourself any favors for getting better at chess.
Another fun fact about working on a single opening.
unless you have a cooperative opponent....
anyways 1.e4 is infamous for having many, many good replies (see a current thread about that).