It kinda tricky!

I honestly learned this last week and I have been here 3 years xD

You can delete a post if you haven't gotten any upvotes on your post (maybe there is a certain day limit, dno). But its still recorded on the blockchain and we can find that data at any time.

You should be able to edit it without a problem, it just cost RC (resource credits) to do so. (RC recharges hourly. The more HP(hive power) you have the more it charges)

Use full hompages for Hive is.

Hivestats.io
Hiveblocks.com

We also have a Ecosystem of tokens which you can explore down the line like Hive-engine.com or tribaldex.com <-- Both are made by the same guys.

Alternative, we have leodex.io all have the same tokens ^^

Not sure what you have, but you can use an extention for your browser called Hive Keychain, which makes youe experience muxh easier.

Then at last, never click a link in your comments if they offer you xxx amount of hive or leo, thats scam and they want your keys xD