Is this the right program

I will try to make this as simply complex of a question as I can. Basically I have a card/board game I have been play testing for over a year. General outline; 1-4 Players, You can produce units, structures, and research during anyones turn but you only get currency and attack(s) during your turn. The game time is counted down by cycles not turns (cycle; once every player goes and it gets back to the first player again). There would be no movement of units. You may attack the HQ(player's hp), or any other unit. Basically its a mix of Starcraft and MTG. The only unit animations would be production (entering the battlefield), resting, attacking, taking damage, and death (leaving the battlefield). It will be a top down view, with 3d models, very similar to starcraft 2/ warcraft 3. The structures will also be 3d models, but I want the actual play area to be 2d. As far as programming goes I have never worked with unity before, my only actual programming experience is in visual basic which I'm almost positive wont help me here. This game is going to be produced for ios, pc, and hopefully android. I hope I have provided enough information for someone to properly answer my questions. Question 1- Is Unity a good choice for this kind of build? Question 2- If the answer to question 1 is yes, then how complicated would the programming for this be? Question 3- would this be considered 2.5d or a 3d game? Question 4- does anyone have any links, sources, or tips that would help? Question 5- In this scenario how hard would it to be make it so one person can play by themselves against an AI Question 6- out of the operating systems I listed which would be the best fit for this game.

Just to reiterate this is already a fully functional game that has been invented by myself, play tested for the last year, and has solid mechanics. But I feel technology is surpassing traditional gaming, so I would like to move this to the forefront of gaming. Thank you for your time and answers. Sincerely, Pixel Mush Gaming