FIRST you will need to get appropriate Permits. Unlikely a Pit will be allowed.
Make windows Narrow and high above Grade to deter Intruders.
Full size door and man doors front and rear. NO windows in Doors. Serious Locks.
Face window side to SE to get natural light.
Install stove after...
I don't know what you are trying to achieve but Pull out some weeds and watch the roots. Air
dries them out. Plants and crops get enough air from the Air! Go figure. Great money maker for the Landscape guys.
Like 'raised beds'. Waste of time, they dry out quicker, a pain to mow around and...
Your next move might be the Ignition and Solenoid Terminals. I would also try a known fully charged battery. I have seen batteries test full for Voltage but have very few Amps available. Think of the water anology. Tank full of Water (Voltage), pump and flow (Amperage)
Use Brake Cleaner to clean up your GG and I put mine in a disposable plastic bag with just the end sticking out. Wipe off the Zerk fitting first and insert well aligned. A couple pumps is all you need. Rags are for ruining. That's why they are called rags. I don't understand how you get it...
Perhaps the Blade tips are worn. Doesn't take much. You may also be mowing grass that is too long for smooth cut. Check Back to Front for level and be sure blades are reasonably sharp.