WOW good thing you came on here the VERY WORST thing you can do to a hot water heating system is bleed it unnecessarily.
All fresh water contains oxygen, Oxygen causes oxidation of ferrous metals (RUST and corrosion)
Every hear of the expression if it aint broke DON’T FIX IT?
A lot of loop systems do not have a bleeder by the baseboard and the better systems have an automatic bleeder installed so you have nothing to do.
If the time does come that a section of this heating system doesn’t get hot then there are lots of viable bleeding options.
In the mean time you honestly should keep trying to locate a LMP heating professional just to give your system a sound check up to insure proper combustion is taking place GOOD LUCK