Breakdown of Yani gelmek istiyorum ama belki gelmem, bilmiyorum.
gelmek
to come
istemek
to want
bilmek
to knowSOMETHING
ama
but, however
belki
maybe
yani
I mean, in other words
This is not completely informal, but it's best to avoid using when conversing with elderly, or people of higher social status'.
Elon.io is an online learning platform
We have an entire course teaching Turkish grammar and vocabulary.