If you do a lot of skydiving yes it will. This is because skydiving requires significant fitness when many jumps are made (e.g. more than 500 a year for example).
During a typical day, you may loose a few pounds of weight if you are training and do not keep hydrated.
the sky is the limit
You certainly can.
Indoor skydiving itself cannot help you lose weight. However, it is recommended that you go on a detox diet before skydiving to promote better health in it's participants. http://California-sky-diving.blogspot.com/2010/10/can-detox-diets-help-you-lose-weight.html
your weight is unnoticeble while climbing stairs because you are resisting the gravity
Yes
If first you don't succeed, skydiving is not for you.
Liquids and gases can change shape without any change in weight.
Skydiving is always cool ;)
The risk of a heart attack during a skydiving is the same as it would be during any other high adrenaline experience. If considering skydiving with a heart condition that could lead to a heart attack, consult your doctor to make sure you are physically fit for skydiving and inform the instructors at the drop zone you are going to.
There is nothing like skydiving in Bangladesh.
It is possible for objects weight's to change, while its mass remains constant.
It depends on how fast of a learner you are. You might get it right away, or it might take you a while.