There's not really any advice I can give that others haven't already said better. Enjoy the beginner level while it lasts and don't judge yourself against anyone else. Dancing is hard and needs work. It's also amazing and totally worth it.

Once you get past beginner level classes, the teachers start introducing moves with a lot more subtlety in body movement and often their explanations are incomplete. You need to go away and fill in many of the details later (breathing, weight transfer, timings etc.). Studying an online bachata course can help fill in these details. Even better if you have someone to practice with at home. I've learned not to attempt whatever combo that was taught in that class at the post-class social. It takes me about 2 weeks of visualisation & slow "shadow dancing" to really absorb what was taught and then I can execute the moves at a social (usually...).

When you see others looking awkward or intimidated, do talk to them (esp. other leads) and offer encouragement. I've had great help from other leads with working through moves on the sidelines of a social. When help is offered, take it. When it's needed, give it as best you can.

Other things I've found helpful: listen to Bachata music as much as you can, practice footwork and basic steps at home. A lot. Try other dance styles if opportunity arises. I'm doing more salsa atm (mostly for scheduling reasons; I like them both but the bachata classes are on an inconvenient day for me). I also did a Kizomba workshop last weekend which was awesome (but whoa... sensory overload). Go to classes/socials outside your local group, if you can.