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It seems to me that you should look for a control panel with good documentation and customer support. This is very important. You should also choose a control panel that you can use with other tools such as cloud providers or something similar. You may need that at any time. In general, we advise you to read this article: https://techround.co.uk/guides/control-panel-tips-for-beginners/ , it may help with your choice. Also an important factor is cost, you should look at your budget and think how much you are willing to spend on a control panel, if you don't want to spend your budget then you can use a free one.