Yo, congrats on lucid dream!
Yeah, WILD is worth looking into, they are not as hard as people are saying if you have natural preference towards them, especially that considering your first lucid looks like WBTB/WILD.
Check out links gab posted and also for prolonging lucid dreams you might want to look into stabilization techniques, here's tutorial: Dream Stabilization and Clarity Tutorial - Lucid Dreaming - Dream Views