Best you could do is join the Academy Discord. I would assume it has some base guide, but im not in it so i wouldnt know. DB as a class is pretty hard to play good on both specs and often unenjoyable, so only really go for it if u really really like the class.
I personally play Lotus as it can be played decently manual with simple mode. As for Shifting without xml and such its pretty horrid to play, but i know someone who does it really well manually. The constant v+3x rmb is just to terrible for me to really play it though.
Lotus is rather simple, but not really easy to pull off. Talents are 3 2 1 1 3 and skilpoints wildfire>lotus slash>cyclone slash. 5-3 is a 6% dmg increase party buff and generally better.
As for combos you are basically constantly in primordia til the end, build up 3 cyclone slash stacks for max wildfire damage on 1st one and usually fire it close to end of rotation.
Your opener is usually petals before fight and wait for its cd to be done then 2>tab>c>rmb spam>petal after cyclone or when 4 is used with V at end of rotation then reenter primordia again.
Wildfire Damage is range based and u have to stand at 4.9-5 meter for the optimal 8 hits as the hits go down the closer u are, which is what makes it hard to play.
Petals is used to get the AP buff 5 stacks back, also as a resist and to lower prim cooldown.
C is used inbetwetween rotation as lifesteal, to trigger badge/brace and the c rmb 4 combo is used as a resist to stay at 5 meter.
Your main resist will be ur X bubble for long cc hits and otherwise the c rmb 4 combo the C and rmb being the main ones u time for as cc resist.
As for wind and earth stance you usually never use 4 rmb c to enter earth stance as c rmb 4 wind stance is just superior. You only use it if u really need that 3 second cc resist.
You also generally dont wanna use q, ss, e as resist unless u really need to, because of the 5 meter wildfire requirement.
If you are on NA i can help a bit better, but this should be decent enough to get the basics and most is just learning, cuz its mostly a manual spec with quick decisions.