Your Idea. It’s not enough to say that you’re going to offer an exercise classes. The people considering your classes will want to know exactly what they are going to get for their money, and it will be up to you to explain it concisely and effectively. Understand that you’re basically giving a sales pitch to potential attendees. You’ll have to really narrow down your topic.
Do what you know. There are many programming languages out there on the market. When you do freelancing, you should remember that clients pay you to solve problems. You are not paid to learn new tools and languages. It is always good to expand your programming skills to learn other languages. However, you should only bid for the job that you are confident with.
I was actually interested in coding back in my high school days, mostly because I was in a data processing class where they taught binary, cobal, ect. I have since forgotten all of those teachings, lol, but the science has taken on a new life of it’s own. There are people making millions of dollars and never even have to punch a clock. It’s definitely a good industry to get into, and it can really be a good income source if you run your own site offering courses.
Ratings. Whenever someone buys a book from you, they will have the opportunity to give the transaction a rating. This is when they’ll tell other potential buyers whether the book was in the condition that you described, whether it was mailed on time, and if your communications were pleasant and helpful. One bad rating can hamper sales, and a couple of them can downright stop them. Excel at customer service and your ratings will help your company grow.