I will start off with two questions :
What is your favorite element in general? (It most likely is time, but I want to make sure)
What is your favorite playstyle?
Answer these two questions and I'll see what i can do. Also, consider changing the title to "Advice on Picking Element in WoE?"
my two faves are time (doi!) and entropy
my playstyle that i like the most is stall and rush
Would you like to do an immo rush? If so, I suggest going for

, with an Entropy mark. You could also start with

and then speciffically choose skills that would make for a good shrieker rush (you would have to also learn the Life skill "breeding" to gain access to graboids, but Life is also a good rusher.)
For a stall, I recommend starting off with Life, since they have a bunch of Heals and Emphatic Bonds right from the get-go, and you could rearrange your strategy later on to become a rush or develop into Aether to make a Frogtal or a Phase Shield stall.
My overall suggestion is to start with

,

, or

.