Draft pick trade value - Dynasty Talk

We are drafting our first every Dynasty league and I am looking for some input on the value of my picks.
I0 team league and I have the 9th overall pick. Half PPR
I’d like some opinions on good compensation I could get for trading away my 1st or 2nd round pick.

Was thinking something like my 1st and 7th for a 3rd and 4th.

I typically prefer to hold onto my early round startup picks. Those are cornerstone players that you build a team around. However, I like selling picks from rounds 4-6 in exchange for multiple picks from rounds 7-9. Although this is only one strategy of many.

If you chose to sell your first, I would first offer 1.09 for 3.0x and 4.0x. This may or may not be accepted. But selling your first should result in a large return. Maybe you negotiate to 3.0x, 7.0x
and 9.0x or something like that.

Often I like to associate names with a pick trade. Would you sell Michael Thomas or Juju Smith-Schuster for Aaron Jones and Allen Robinson?