ok.. annoying question here.

would someone be willing, to once again, explain to me in a simple short way, how the trustlines work. I mean i understand its with the tool kit. but i dont have that yet. and all my xrp is on one online platform. and i dont like the thought of moving them. but i want all the air drops :D specially solo.

if anything i would only like to move them to cold storage i guess. not to some new platform i dont know...