Actually, MT-based platforms are the most popular platfroms nowadays. They are fast and reliable. They have user-friendly interface, that is important for newbie traders. In fact, almost all brokers offer these platforms even under their own brands.
Another important point is that there are many custom tools like indicators or script extending functionality created by the trading community. Most of such tools are available for free, that is one more advantage of these platforms. Some of the brokers allow traders to choose between the MT4 and its newer version, the MT5. Both them have strength and weakness. If you are interested, you can make your own research or just check one of comparisons. For example, MT5 no longer supports tools created for MT4, so you will have to look for the way to convert them into another format. It happens because of the difference in programming languages used. There are many other aspects, so you can compare the platforms on the points that are the most important for you.
Anyway, MT4 is still a great platform since it has almost all functions needed by the newbie traders, so it would be better to start with it and then switch no the ew one if necessary when you will become experienced trader.