It's best to open a computer shop, which requires certain maintenance skills, plus funds, industry competition and meager profits. I don't recommend you to engage in it, and I don't believe that you can eat three meals a day by ps.
It's suggested to do some small businesses, such as clothing, food, toys, small retail stores, etc., rent a storefront, and then investigate the market sentiment, local habits and customs in your familiar environment, and learn about the competition in choosing the same industry.
Here are two examples for you, a clothing store downstairs of my house, which is run by a foreigner. What are the characteristics of this store? First, the horn is ringing and uninterrupted, what financial crisis, manufacturers are losing money, and they are having a big sale at a loss ... Second, clothes are cheap from the beginning of 30 to 40 yuan, and they are dropping every week until they are fixed for a long time in 25 yuan. I thought the store was really having a big sale at a loss every day, as he said, but I didn't know last year. Therefore, this store has many marketing skills. You must first find out the source of goods and choose a good market. Obviously, this store is facing the low-end market, and we should not underestimate it. We should draw a few partners and study and consider it.
The other is an example of my cousin, who is about the same age as you. Last year, because she was going to have a baby, she came back from working in Hangzhou and stayed at home for half a year. Later, she happened to see her friend open a roast duck franchise store in Hangzhou, and the business was extremely hot, which directly led to the strike of the lo mei industry in the local market. I opened such a roast duck restaurant with my wife in my hometown. In the first three days, I engaged in activities, and the daily sales were 200-300, and the profit per roast duck was 10 yuan. I can maintain the daily sales of about 100 for one month, 30-80 for half a year, and 5-30 days after one year. As you can see here. From last year to today, my cousin's business is really not what it used to be. One day, she can only buy 2- 10, but she did make a small profit in the early stage of opening, and she successfully passed the dilemma of getting married without money and having no money to buy milk powder, so this business has to be considered as a retreat.
It's best to do small business, and social intercourse is necessary. Unless you have language communication barriers, many things will come naturally, introverted? I used to think so, too. Later, when I went to work in the society, I gradually became shy and eloquent. After some experience, you will be amazed at your ability.