~ What session of the market do you think its best to buy when DCA?
It's best to lump sum during a bull market and DCA during a bear market.
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~ Do you just buy at every market price while DCA?
Yes, just turn on a recurring DCA purchase and let it be. Don't try to time the market. Just consistently buy a fixed amount over time.
I have said that if you don't know whether or not you should DCA or lump sum, the answer is ALWAYS DCA because if you were truly convicted, you would know that you should lump sum as soon as possible. If you haven't reached that point of conviction yet, just set up a DCA and continue learning until you become so convicted that you dump all of your fiat for bitcoin as quickly as possible.