I would recommend that you first find out what type of Aikido you would like to practice before setting of on this endeavor. Type meaning major style {Aikikai, Iwama, Yoshinkan,etc...} then flavor within the major style. Each sensei has his/her own flavor. You might end up at a place that is very soft for a long time just to find out in the end you would like to practice a hard version. Practicing long hours everyday is very taxing and will be especially so for someone who hasn't step foot on the mat.