New member could use some help in Michigan

If it started once and now it doesn't that indicates a connection issue. The battery to ground or the positive to starter. If the solenoid is 'clicking' then the current isn't flowing that would be a ground problem.
 
Just because it is new doesn't mean that it is a good battery
Check battert voltage while trying to start
If it drops below 10 volts it is not going to start.
Also you might try jumping it let it charge for ten minutes b4 trying to start.
Hooked it up to the jumper cables. Started up right away. Let it run for 10-15 minutes. Today won't start again, so I'm going to jump it again. Could you help me understand the malfunction?
 
The battery is not 100% charged. I had a similar issue with my R3. The battery was bad and I needed a new one. The new one took like 36 hours to get all charged. make sure you are allowing the tender to be connected several hours before disconnecting it. The process to charge the battery takes several cycles that needs to be followed. Would you happen to know how many milliamps is your tender?
 
I know that it's a 5 amp, so 5000 milliamps?
 
I know that it's a 5 amp, so 5000 milliamps?
Read this

  • Charging Process:
    • Battery Tender chargers use a four-step charging process: initialization, bulk, absorption, and float.

    • Initialization: The charger checks the battery's condition and prepares for charging.

    • Bulk: The charger delivers a high current to quickly bring the battery to a certain voltage.

    • Absorption: The charger maintains a constant voltage to fully charge the battery.

    • Float: Once the battery is fully charged, the charger switches to a lower current to maintain the battery's voltage and prevent overcharging.
 
Buying and using a digital load tester identifies your battery issues instantly and they are not expensive. I have many 12v battery's to look after & I've got an analogue battery tester (500 amp carbon pile) and a digital one, either are a good investment for the home mechanic I reckon.