Help with son education

Ok so first off I know he young and it’s not many will see it as important but I do and I need advice on how to go about this. My son is 6 . He been behind from the start. He had occupational,speech and physical therapy. We are still waiting to get him evaluated. They are so backed that we waited three years and in July we will get him tested. This is mostly for people to stop saying things like “ you just have to try harder” to my son. He trying his best and we all are. It makes him frustrated and I hope to have this done they will stop and actually be a teacher and help. Not all the teacher cause honestly most of them are really really good it’s like one or two out off all of them. I work full time and my husband about to work full time. Our kids are in after school currently. I work with them when I get home but because I have to make dinner and everything I get 15 minute with each of them . I got him an iPad for Christmas . He asked for one and we had one prior but it broke. I thought it’s a perfect chance to put some helpful games on there like I did with my oldest. And maybe get a subscription for a fun educational program he can do in afterschool. He is behind I red word and reading and speech . I need to work so I can’t be a SAHM . I get panic attacks if I don’t work and make an income. To afford their afterschool program which we would need regardless of full or part time, I need to work full time. I need help with program I can buy or things that would help him with his education that isn’t to difficult as he still working fine motor skills. He pretty smart but because of being behind from walking till now, everything is just on a slower pace for him. We are working on using scissors and writing together by writing letter and doing some crafts during the weekend and got him left handed and right handed scissors. He uses both depending on the task. He was left handed only but school tried to get him to use his right hand and well now he confused and I am confused on which to buy and what to do .