Big difference between ideal, and manageable, and in my opinion ideal depends on where you are in your skydiving progression.
Shorter stocky people will often have a much easier time with their student jumps. They have less rudder to deal with at a time where it could be described as uncontrolled or minimally controlled rudder. For example my easiest tandem students are short guys with a beer belly. They have a built in arch, I could sleep on the way down.
Your tall lanky student has more control surface, less built in arch, and problems with body position with their legs and arms have a bigger impact on their stability.
As you get your license and move on to group skydiving the lanky ones have more tools in the toolbox in terms of fall rate and body flight, but the right jump suit choices for can narrow the gap for stocky people.
All that being said your body type won't be a problem at all.