w salam
i am not an expert not much experience.............but ans ur query
according to my point of view.........job ka sath css ho sakta ha.........thori effort extra karni parti ha..........but if it is ur aim then i think no pro..........u can surly do it with job........best of luck
ur second question about accedmy.............if u think that u have ample knowledge and capability that u can understand the sub and do it then dont join it.............but if u think u cant do and u cant make ur routine then go for any good accedmy.........it is beneficial.............as u r doing job so i dont think u have so much time that u spare for accedmy..............rest u can think
3 question about writing..........likha huwa samhaj ana chaye...........ap writing competion main nahi ja rahi..........so i think it is not a big pro according to my point of view.........jo kuch likha ha woh samhaj ana chaye bas
books recomedation...........abhi main khud book select karna ki stage sa guzar rahi hon..............so cant ans ur this question
best of luck
regards