All my related questions to lifting

Hello lads,

I have a couple of questions related to lifting, partly because these questions occupy mind 24/7 whenever I am actually at the gym. Things like 'oh god, I'm doing it wrong, I won't be getting any better, etc etc'. I hope somebody could take some time to explain why I'm thinking wrong, or answer the questions, and help me get past this beginner's ramp.

So without further ado;

1. The workout. My coach has made me a 'suited' workout for me, seeing as I'm a 19 yo, slighly overweight, dude who has little muscles on his body. I'm relatively new, and he thought it was best to start with these exercises to train all the parts of my body.

-Lat Pulldown machine
-Chest Press Machine
-Pectoral Fly machine
-Seated Row machine
-Back Extension
-Leg Press Machine

All of these, I do 12 x 2.

As for the core:

-Crunches(20x2)
-Since I suck at the tapping toes exercise big time because my movement is way too restricted, I was given an alternative, the 'touch the knee part while your leg is on top'. This is supposed to train my side abs.

My question is, is this actually a good workout for my first 6 weeks? Any better alternatives?

2. Weight Balancing. So I tried to do a triceps chest press dumbbell exercise, and quickly noticed how I have literally no balance with the weights(I tried lifting 2 10 kg's), and getting them up and down in sync hardly worked well for me(one was really going left and right all the time, while the other was more stable). My question is, should I go to a pro and ask him to help me, or should I continue doing this, and expect that this issue will become less the more I practice it?

3. Hand doing all the work. This is not a innuendo, this is more like a personal feeling I get every time I lift something. Say, the Lat Pulldown. Every time I pull it down, I don't really feel like the designated area gets worked well, regardless of the posture I try to recreate every time. I feel more like my hands and arms are the ones getting tired. Is this normal? Should I feel like my hands and arms are getting tired, distracting it from what is really getting workes(the lower back)?

4. No energy. Sometimes, like when doing the crunches, I notice how I literally have no stamina left, compared to say, last week. So I start off doing my first rep, which is pretty good. But immediately, after taking like 30 seconds break, I retry to do it, and I feel like I'm physically unable to get myself up without the help of my arms. I notice how my feet can't stay firm on the ground, and my arms I have folded on my chest force themselves up. Is this natural? Or am I doing something wrong here?

5. What are some good exercises with dumbbells for beginners? This is a basic question, but whenever I enter the 'non-machine' part of the gym, I get really confused as to what to do. I could do some 'pumping'(don't what how to call it else), where I grab a dumbbell, and just train my biceps by trying to move my lower arm to upper arm, but surely, there must be better ways of using them to practice various body parts(like triceps and biceps)?


That is all for now. Thank you if you have actually read this, and I hope you are not facepalming at this right now.