An obligatory element of sales is knowledge of your product, all its characteristics, knowledge of a potential buyer and how the product solves his problems. And also - the ability to speak with the client in "his language" and look the way he is comfortable. For example - if you sell soap bubbles, enter the image of the happy owner of these bubbles. You need to know and be able to do a lot, and for this a correct start is important, so as not to "go too far".
Get a job with a training company. There are different sales methods that should be applied in different situations. Some companies prefer to hire newcomers and train them from scratch to sell their product. Try to get a job with a similar firm. Successful experience will help you in the future to move on to selling a more profitable product and learn other methods. The main thing is to start.
Read about sales and practice. There is a good book, The Lucky Trader, by Frank Bettger. It sets out his personal sales story. He shares how in the beginning everything did not work out, and how he later became the best seller in the company. Look for other books. Read and take notes as much as possible. And do not take anyone's word for it, check everything in practice.
Take trainings "on the side". Don't dwell on what the company teaches you. You're not going to work here your whole life, are you? There are many more lucrative items for sale - cars, real estate. To get to this level, you have to work hard on yourself. Go to all the training you can afford. Better save on entertainment, then it will all pay off.
Try it, try it, try it. The more experience, the easier it is to apply something new.