I have a some mixing question.  If you want to mix coins do you send them as follows:

Step #1)  Enter your address for your Wallet #2 in the best mixer.io site
Step #2)  The mixer site will provide you a to address to send in your BTC.  You would send your BTC from your Wallet #1.
Step #3)  After some time, the mixer service will deliver the new BTC to your Wallet #2 but now it should completely untraceable

Wallet #1 = old wallet "traceable BTC"
Wallet #2 - new wallet "untraceable BTC"

Question (#1) Did I state the steps correctly above?

Question (#2) What is the purpose of adding a transfer delay?

Question (#3) When I go to https://bestmixer.io in my Tor Browser I am redirected to http://bestmixer7o57mba.onion    IS THIS NORMAL?

Question (#4) Is it OK that both the old wallet #1 and new wallet #2 are created in the same Desktop Wallet?  In my case I'm am using Electrum.

SORRY I AM A TOTAL NOOBIE.