Is It Possible To Learn Self Defense Without Sparring Fight?

Based on my experience: Yes.

If anyone tries to convince you that you cannot do it, remember these: There are lot of legendary martial art masters who successfully did solo training and research alone, to improve their skill or even create new martial art style.

- Miyamoto Musashi spent 2 years seclusion in forest to training Kenjutsu alone. He perfected his signature dual wielding swords technique (Nito Ryu), won many battles and duels, and became legendary swordman in Japan.

- Masutatsu Oyama spent 3 years alone in a forest, training Karate by himself. He came down from the mountains, beat all challengers in brutal "MMA without gloves" tournaments against challengers from various dojos, then founded his Kyokushin Karate school.

- Ip Man spent years alone, training on a wooden dummy, defeat many tough challengers and became one of the best known Wing Chun Kuntao Grand Masters in history.

- Zhang Sanfeng lived in the mountains for years, and created his own martial art styles like Tai Chi, Tui Shou and Wudang Kungfu. Now millions people on the world practice his art.

- Tadashi Sawamura spent his time to training his Karate and Boxing skill in mountain alone, created his own Kickboxing style to revenge against Muay Thai fighters who defeat him in tournament before.

History is full of people who disappeared for long periods of time. They lived in seclusion to improve theirselves. After that, they became great figures we knew today!!

Honestly, sparring fight and fighting tournament are can be counter productitve for real life - street self defense training aspect. Why?

Most pro fighting clubs like Sport Karate, Sport Taekwondo or Boxing are only focus on fighting tournaments nowadays. They only focus on sparring fight training using fighting tournament format. Sadly, they lack of self defense techniques training which needed in real street fight for survive, for example: Finger Stab, Knee Strike or Groin Kick.

In reality, when you fight on the street against armed robbers, there is NO RULES!!

By the way, do you know how i got Jeet Kune Do certificate so fast (started training in 2017 - graduated in 2018)?

First, i already have Kickboxing certificate since 2013 (my Jeet Kune Do instructor also knew this). Second, i spent my holidays to do solo training alone to perfecting my Jeet Kune Do techniques (this solo training is the most important key of my training).

Well, if you have a source of information to give you a guide for your martial art training, you can train at home. And if you are self motivated (as opposed to group motivated) personality, you can succeed. Persistence and motivation are the keys to such success.