Hello, I will try help you with this.
The green electrolyte indicator is not an accurate indicator for the battery condition.
The easiest thing to do is try another battery if you can get one.
If your battery is faulty then sometimes even using a booster pack will not help as the faulty battery acts like a sponge and just soaks the energy from the good battery.
You could try using the booster pack by disconnecting the negative terminal from the battery and connecting the positive lead of the booster to the positive lead of the battery and the negative lead of the booster to the disconnected negative lead.
If it then starts you know your battery is faulty.