I have been recording multitrack since I was a kid. I hve fond memories of bouncing tracks on a dual deck stereo in my bedroom, but I digress.
1. Just do it. Practice makes you good. This is the best tip here.
2. Levels are everything. To low kills dynamics, too high kills dynamics and distorts. Digital is way way less tolerant of hot levels than analog was. Record as loud as you can without clipping, no matter how loud you set it in the mix later.
3. Once your flailing dies down, find someone smarter than you to shake it up again, or just start adding stuff to the chain. Consider: On axis, off axis, impedance, grounding, balanced, compression, eq, etc. But keep it simple until you get predictable results. Simple changes can beget huge sounds.
4. Have fun. Record dumb ditties. Getting too serious is a downer and gets you lost in the technical. The technical crap is the alluring tar pit of art. The goal is to be just fluent enough to get out of your own way. You are not gonna make The next 'Darkside of the Moon', but you can get 'mellow gold'. If you have the million dollar idea, this is just to preserve it until the real studio. Fun crap beats dilligent boring.
5. Nobody can tell if you are playing a $15k martin or a $100 pawn shop beater on tape. Buy what plays well, sounds good, or makes you smile. Gear envy plauges us all, but its nonsense. I got my best acoustic sound yet out of an 8 dollar thrift shop guitar, and my best sounding guitar pedal is a 12 dollar knockoff that sounds better than the expensive one it copies. Buy, sell and give away cheap, functional gear thats not getting its due at every opprotunity. You will meet and enable other artists while enriching your own creation. Those you inspire will often go far, including yourself.
6. The gear I recommend noobs look into: A. Cheap 2ch interface with XLR inputs and a 1/4" unbalanced. B. Quality balanced xlr cable. C. Shure Sm57/58, a matched pair if feeling spendy.
7. Power is important. If recording Amps, Synths, or other electronics direct, beware floating grounds! I have seen a few fried laptops from incorrect grounding issues on older blgs. Try to keep all the gear plugged together on its own circuit. Carry a plug tester, and consider an isolation box only if you run expensive gear or have noisy power and have cash to spare. A $25 hosa hum eliminator/transformer is usually all you need if you have issues with audio hum. Surge strips are insurance against spikes, and more outlets on a circuit, but do nothing crappy power or line noise. Florucent lights and brushed motors are the enemy, turn them off where possible, move far away where not. Switching power supplies are also often suspect for high pitched noise, as are old crts.
Hope that helps someone. My experince comes from being in, and recording lots of bands when I was younger. Punk, Techno, Metal, Jazz, and Folk all record about the same. The difference is how it mixes. I still have a decently sized studio, but have been in a funk and spending my time in the garage instead lately. Shoot me any questions, and Ill try my best.