Congrats on your first LDs!

First ones are usually short, so no worries. But you can read up about dream stabilization techniques. They should help you stay in a dream longer. Also, plan out what you gonna do in a dream, write it down. For first couple of times, I would suggest taking it easy, not doing anything too complicated.

Sounds like the dreams you had were DILDs. You can have more of them by practicing technique called MILD. You find all this in DV Wiki.

Good luck!