But that's the whole issue with inexperienced incels; they missed that rite of passage puppy love, innocent, experimentation phase.
Then they get shamed as low-status, evil, unlovable, hated, dangerous members of society for being behind in the experience game.
It was a lot easier to acquire experience in courtship and love-making when done within the confines of a marriage (or at least with a high-school sweetheart) because the pool was a lot smaller and monogamy and chastity before being wed were at least strongly encouraged if not unrealistic.
You might be awkward and awful in bed for a long time. But at least you were working as a team with your partner who had it in their interest to be patient and help you improve, for future investment and lack of other options.