If your aim is only to solve your problem in this world or in the upper world or in both, you have nothing to do with the formless God or the form of God. Your work is done when you pray for it sincerely. But mind that your love is not for God but for the solution of your problem.
Then God gives the solution for your problems only in a temporary way, which is not good for you in the long run. He postpones your bad results and brings the good results from your future births to the present. By this, you only enjoy the results of the deeds, which you have done and you cannot enjoy the results of the deeds, which you have not done.
It is like sending your application to the officer through a peon [office boy] after paying the necessary amount and getting back the application with the signature of the officer. You have nothing to do with the personality or the qualities of the officer. But when a girl loves the officer, she likes to see the personality and know about his qualities. His position as an officer is only one of the several aspects. Often, she neglects this aspect of the post, when the personality and qualities have attracted her. Similarly, a real devotee feels happy by knowing the details of God and he is not worried about the benefit from God. In this case, the Lord suffers for bad results of that real devotee and gives him eternal happiness.