I recently bought 0.1 NEMstake using the NXT asset exchange.
Is this all I need to do for now? Am I all set or do I need to do anything else in order to claim ownership of my coins? And what will I need to do once the NEM blockchain is launched? How will I turn my NEMstake asset on the NXT AE into actual NEM coins?
anyone who holds nem on the AE does not need to do anything yet. when you do it should be as simple as sending you nemstake to a nxt address along with a nem address. that phase of the process hasnt been released yet so you dont need to do anything yet. but its advisable to check back atleast once a week. you should have plenty of time to proceed once the time comes.. atleast a couple weeks anyway so checking once a week should suffice.
Ah, good. Thanks. That was what I thought. Looking forward to seeing my 100,000 NEM soon.

How did you buy 0.1 NEM. I would like to buy some too. how can I do it step by step. NOOB here

and who's account is the most trusted on NXT-AE. Thank you
This is probably the easiest way.
http://www.secureae.com/ They will automatically convert your Bitcoin into NXT and then you can make bids. I think there is an option to buy directly with Bitcoin too, but don't quote me on that. You might be able to save one or two percent by putting you bitcoin on an exchange, then transferring to NXT, then putting the NXT in a wallet on your computer. Then buying through the Asset Exchange directly, or you can save a couple steps and pay a little more on
http://www.secureae.com/Also, there is only one place selling real NEMstakes. There is another person but it is a scam. This is the real one.
https://nxtblocks.info/#section/assets_exchange/market/12465186738101000735Account number NXT-J62B-CNAR-34YW-4RCFN