I'm new to bonsai and I found a spruce seedling in my yard in minnesota that looks promising. I pulled it out of the ground and got about 2/3 of its roots. It's about 9 in. tall I placed it in a pot with a mix of black dirt and bonsai soil (calcined clay, lava rock, pumice, and pine bark fines). It gets about 2-3 hours of direct sunlight and several hours of indirect sunlight. I'm thinking I'd probably water it once every 2-3 days. Its been 3 days now since I potted it and some already slightly yellow-brown branches and needles are more yellow-brown. I'm looking for some advice on what to do next. When should I start training it? Will it be strong enough to start training this winter? Should I fertilize it yet this as it's autumn in Minnesota right now? Am I watering it enough? Too much? Is it getting enough sun. Any advice would be appreciated. Thanks ahead of time. Attached is the seedling as of today.