@otbnc -- Congrats on a great purchase!
Coming to 2 wheels from 4 wheels is tough! I hope you are good at least at riding bicycles. I remember my auto racing crazy friend went mountain biking with us for the first time. He knew how to ride a bicycle before... or so he thought. He crashed like 5 times probably. When he wanted to turn right, he was steering also to the right, LOL!
Then I took him and my other mountain bike racing friend to a motocross track. The mountain bike racing friend did okay, eventually looping out on a tiny jump. He had fun. Buy the 4-wheel friend was a little short for the bike, and with his poor balancing skills he was unable to even start riding a dirt bike on his own. That was funny to us but not to him, LOL!
Check to make sure you you have a v.2 shock:
MXR Rear Shock v.1 vs. v.2
And make sure you have the stock 60 N/mm spring. The spring should say 60-260 on its side. That spring is good for your weight.
I weigh almost the same as you, and I have run everything from 154 to 174 psi In my fork on different tracks.
But regardless of what shock you have, you can still start riding at the MX track and do jumps. Even with the wrong shock the bike is still safe and okay to jump. Set your clickers in the middle of their adjustment ranges. If you have an original non-revalved v.1 shock, turn the rebound clicker all the way in for more damping.
Once your skills improve, let us know! You can try playing with the clickers yourself too and see what you notice.
Do not become too focused on your suspension at this time. If it is in the normal range, you should work on your riding skills instead.
Watch MX riding training videos on YouTube. I would also recommend Gary Semics' training videos at
www.gsmxs.com. I think Gary spends his winters in NC, so you might be able to get a MX coaching from him in person.