The best way to learn about a style is to go and do it. Try to find an Aikikai and a Shodokan dojo around where you are and pay them a visit. Of course, it is possible that that particular dojo is not a good example of the style but in most cases it will be.
Then pick the one where you feel most comfortable. I would not advice doing both at the same time as you'll get really confused. I am now cross training in Aikikai since I got my shodan (does that make me a kyuless shodan?) and I find it sometimes confusing.
If you are in the UK, let me know and I can point you out to some good Shodokan and Aikikai dojo.