I would personally go for a teaser to see if the general idea sounds good.
That said please take time to remind yourself that if you write it has to be because you enjoy it; because you have an idea in your head and receive joy from the process of bringing it to life. Reflect in if it feels like something you enjoy or a chore.
If it is indeed something you like to do, just do so.
No apologies. You are bringing adventures to life for free and owe nothing to no one; writing is for you to enjoy.
No delivery dates for new chapters or expectations for your story to be a masterpiece; no nothing that may take away the enjoyment.
Write whatever you want however you want, learn in the process, make mistakes, write again, learn more, make more mistakes...
And yes ask for input if you're stuck but outside of that just experiment and be your own boss; mistakes don't exist, just happy accidents.