There are so many things you start to gain as a self employed person aside the freedom you get working for yourself you also have the decision to make for the things you want and the things which you don't want when you are your own boss. Working for yourself gives you the liberty and motivation to work extra hard knowing that the profit and loss comes to you if the business turns out well or bad.
You mentioned the advantages of working for yourself, but do not forget that there are also many disadvantages, such as the fact that all the responsibility is on you. You have to work much more than you did at a regular job. There are taxes you are personally responsible for, and failures in business can be difficult to deal with. If we talk about freelancing as a form of self employment, there is also the risk of being left without orders or work tomorrow. Therefore, in any case, there will be both positive and negative sides, and you need to weigh them and understand what suits you best.