Im new and don't know what to do

hello my name isTyson and I'm a newbie.
im defiantly not a mechanic but I can't watch YouTube and figure things out lol. So please go easy on me as I'm new to z31's and turbos as well.
I recantly trades a truck for an 86 300zx turbo. It's a fun little car, and defiantly changed my mind about imports. It does however need a little work. I drove it for about a week and it would puff a little blue smoke on start up… that was it. Never while driving. I did oil change and I put 10w-30 oil in. Now it smokes like chimney, start up acceleration, deceleration, and not just a little. I smoke out an intersection while sitting at a light. I then changed the oil and filter again to a different brand and I went to a 5w-20, also added some Lucas stabilizer as well. It helped a bit but still smoked a lot. I put a new pcv valve in, which helped for about 20 minutes then started smoking again, so I grabbed another pcv and tried again… no luck. I've taken the intake piping off to see if there oil in it. The only oil I found was right close to the valve cover input, which I thought would be normal?? I did a compression test and I'm not sure what I'm suppose to hit but I was between 140-150psi cold.
I soon realized that pulling the turbo out is a huge pain in the a$$, and I don't really want to rebuild the motor just to have the same problem. Is there anything else I could do to help trouble shoot this? should I be looking at the turbo or the rings? Or valves? Any help would be nice, thanks.