In Mobile Strike you will have no possibility to take control of the CP as a free player, but you can have a lot of fun playing Mobile Strike as a free player regardless. There are a lot of alliances that are free players only alliances, these hives have dedicated players who have a great community, a lot of fun and play for the teamwork and pushing the game to its limit without paying.
In a state there are usually a few of these alliances/hives that wage war against each other, do research and have great fun farming tiles and explore their surroundings.
Even as a free player you can build big armies, do rallying and attack bigger bases if you work together.
So before you decide to buy a package, try the game as a free player.