If you can't beat a lower level, you are destined to lose at a higher level, even if they respect your raises. Which means you are playing predictably and are exploitable. Which means 5NL players will own you sooner rather than later.
If you can beat a lower level grind out your bankroll challenge there, and only move up when you have enough money to take a shot, and then move back down if that attempt fails.
Don't take shortcuts by depositing more money because the online poker graveyard is full of players who followed that route. Unless, of course, you are proven at higher limits, and can afford to deposit more money to play these stakes. If you are not sure you are not good enough, then don't risk any more money unless you can afford to lose it.
You currently have $81 and I suggest you drop back down to 2NL and grind your bankroll up to $120. Then take a 10 buy in shot at 5NL, leaving you $70 for 2NL if your stay at 5NL is not successful.
"Why do I lose at 2NLz ?"
Winning players lose at 2NL it's called variance. I have lost 28 buyins at full ring during a downswing, and 11 buyins in one day playing 6max. That's why you need a deep bankroll because even winning players can lose for tens of thousands of hands.