I always train more than one at a time even from day one with a totally untrained puppy. Otherwise training becomes boring rather fast. You want to try new things maybe 3-6 at a time with a new puppy. Keep it fast paced and short and fun. The idea is to quit while they are having a grand time and raring for more. So next time they are so excited and listening not oh no the perfect sit AGAIN! yawn.
So they need to be simple and use food lures and a clicker for the best and fastest results. The classroom here has some good clicker and puppy training. I started out with sit, down, side, come, and quickly added roll over and backup. Start letting puppy drag a leash around now with the loop cut so it doesn't get caught so he'll get used to feeling it. Younger is better. If you want to dremel his nails now is a time to introduce the sounds and feel very slowly, never scare, and clip nails if you're going to clip at least once a week but very very tiny bits.
three or four sessions of only 1-3 minutes a day are better than longer or one marathon session. and if it's not perfect don't keep going until it is. every dog and human has an off day. try again tomorrow and ask for tips here. there may be a much easier way to get that perfect sit etc. The most important part is that you are both having fun. The second you get frustrated STOP. You don't want that negative energy to go to your puppy and ruin future training because he's unsure. Best of luck. Be sure to ask for tips if something seems hard. I have more suggested clicker free sites and reading if you are interested. :dogbiggrin: I also suggest patricia mcconell’s Puppy Primer for a good starter.