Yoga is a non-competitive sport so there is no need for any special physical traits to practice yoga.  All you need is desire, patience, and perseverance. We do not practice yoga to become flexible, it is practice of concentration, listening, attention and awareness. Flexibility, when it comes, is a by-product of it.

Yes.  

Yoga is open for everyone! Yoga teaches us that despite the differences in cultures and mentality, we are all alike. We all have a heart, a pair of lungs, a liver, and a brain. Since we all share the same human core, we can all utilize this practice to help us overcome our difficulties and alleviate our sufferings.  Therefore, yoga can benefit everyone, regardless of traits, age, or inclination.  

Traditionally, it is ideal time to practice is at sunrise or sunset. Most people prefer to practice early in the morning because during this time the body and mind are still fresh and quiet and there are few external disturbances.  

One should wait at least four hours before practicing after a full meal. The two main reasons for that are first, the stomach and intestines are full and heavy after a meal which restricts movement. Secondly, practicing after a meal disturbs the body's natural flow of energy required to digest food. Not many of us know digestion requires a lot of energy. 

Props make it possible for every person to enhance their Sadhana (practice of yoga), regardless of their physical limitations. 

The use of porps allows one to : 

– Perform difficult asanas independently 

– Achieve and maintain correct alignment  

– Holding asanas for longer and relax, thus attaining their full benefit 

– Understand the asanas on a deeper level 

– continue practicing despite of chronic or temporary ailments and improve their condition.