Re: learning 2 arts at the same time
Since you are relatively new to Aikido, I recommend you just study Aikido for a while. The length of time is ultimately determined by you. This is your walk of life. But, if you commit to something, don't do if half-way, and Aikido training is not just on the mat. It can consume all of your time, whether you are at the dojo or not.
Then again maybe not......