Plan to smoke some ribs for the first time later today.

I try to keep ribs simple. no wrapping or basting or any of that. 250ish for 4-5 hrs. sauce during the last 30 min.

What kind of cooker you using?

Webber kettle grill.

Only through YouTube videos.

I would be concerned about cooking at a high temp.

Weber kettle smoking is easy. Do not overload with lit coals and try to keep the top vent open as much as possible and control the temp with the bottom vent. Do you have a way to monitor the temp at the lid?
Place the lit coals on one side and indirect cook the ribs on the other. Baste with sauce about 30 minutes to pulling them off, open up the vents to get the temp up and sauce will caramelize.

I have a temp gauge on the lid and survents on the top and bottom.

I can't get the temp low enough, too much coals? It is hovering at 275-300

Top is all the way open and I keep moving the bottom around. With both open right now I'm around 230 degrees, but it just keeps fluctuating.

I've done ribs a few times on a BGE. I get the temp to hold at 325 for cooking. I tend to use Hickory chunks for the smoke.

I like a dry rub versus wet. I have a rub I bought in Memphis that a local butcher was selling. It was the recipe one of the winners from the BBQ fest uses. I coat the ribs heavy with this right before it goes on the grill. I use a platesetter for indirect heat.

Cook for about 1 hour and 45 minutes. They're done when the meat pulls back from the bone a quarter inch and you can fold the ribs in half at a 90 degree angle without breaking.

I've been wanting to do a longer smoke, but haven't planned ahead yet.