Am I being unrealistic thinking I can do my first unmedicated birth without a doula or taking any classes?

This will be my second child, first time with a real labor. I was induced last time and had an epidural. Never felt much pain. My husband will fly into town as soon as I say I'm in labor. So I won't be totally alone. But neither one of us have taken an actual natural birthing class. I've been doing research on different positions, breathing techniques and such. But I'm not 100% convinced I'm gonna be able to do this without a doula by my side.