how to change android account?

background: I'm getting emails saying i successfully bought some items (in Thailand) .. I have not paid for anything.. yet. If someone is using my email then i guess they don't see any replies.. or this is worse than i expect and they have access to my account. .

I have had this address for a very long time. I have changed my gmail account pwd to something more cryptic but would like to discard that gmail address and use another one that most friends and companys know me by.

My android devices and anything new i buy are all signed in with the original gmail account.

Can you delete a gmail address (rather than just not use it) How do i go about it and what should i expect in doing this.. 'if' it is possible?

appreciate you help.. sad times we're living in.

 

Thanks all for your comforting posts!

you can get paranoid if you're not careful.... I'm glad Dannydet mentioned the reset of the phone.. I didn't know that. It can take quite a time to get a reset phone back to how you normally use it

I think I'll leave it alone and tidy up some weaker passwords I have used in places.

appreciate your time to reply.