This is good advice! I've been training and playing competitve sports for a half century. I have only a few things to add / quibble about.

To #1: "Exercising correctly" is a life-long process that is never finished. Definitely go with lighter weights to start. That is excellent advice. You'll get awesome newbie gains and be sore as hell even with light weights.

Yes, you should learn how to do pulldowns and presses so that you don't pinch or tear something immediately.

More importantly, you need to learn to exercise correctly for your body at your age at your fitness level at your level of stress at your average sleep time. That won't happen in a month. Be realistic about this.

To #2 and #4: Sleep and nutrition cannot be emphasised enough. Food is your fuel. Sleeping is when you build muscle. Jeff Cavalier (Athlean-X on YouTube) has a great saying that goes something like this, "What you do in the hour in the gym each day is not nearly as important as what you do in the other 23 hours."

Your only competition in the gym is yourself. Never forget that. Unless you are a true genetic lottery winner 1:1,000,000, there will always be someone bigger, more ripped, and/or with better genetics. Strive to be the best version of you that you can be under your circumstances.

Finally and most important for fitness is consistency. People taking steriods can see impressive gains in a very short time. Sadly, they often need to see those gains quickly because so many guys on "gear" die so young. A super-ripped Instagram star just died two weeks ago at age 30!

If it was quick and easy to get huge and/or ripped, everyone would do it. It is the same with any sport. Consistency is the key. Train consistently, eat well consistently, sleep consistently. You will not probably not be amazed at your progress after a month, but it is incredible the changes you can achieve in a year - if you are consistent.