Another quick trick if you get all balled up with weeds and can't go forward very well- put it in reverse and rev it up. Sometimes what floats to the surface is amazing.
Now back to your original problem, when your rig yelled at you, I assume that it was the alarm at the control box?
You may have been triggering that alarm on high heat (no cooling water), although there are other ways to trigger that alarm, including simply leaving your key in the on position without actually starting the motor (it's how you test your alarm).
If you were temporarily plugged up and heating it, you need to shut down quickly and investigate. It doesn't take too long to ummm.

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Methinks that you are okay as long as you ran well afterwards
You're asking all the right questions as you learn. It's a pleasure to watch, as opposed to the new pilot that is too proud to admit gaps in the knowledge. You will notice that even the old salts here still ask questions. A great thing to have the 'collective' to help any of us.
Glad ur having fun. Keep at it. You're doing great.