Restaurant Design

For my University I have to create a restaurant and do all the marketing and everything as if I were to open it.
Therefore, I also had to do sketches of how the place would look from the inside and from the outside.

Its a very small place (has a capacity of around 100 people) because it used to be a night club.
Thats why I decided to do like a open window like you can see in the last pic so that light can come in.

In the picture you can see the tables, the main bar (which I think I did too big); then the leisure area at the right where theres a big projector for men to watch football, a darts and a pool table (or the football thingy) and then of course the bathrooms.

Although I love design and drawing I dont have a clue about the digital side. Therefore, I wanted to know if its possible to turn the first sketch into a professional one done by computer.

Kind regards,
Ines Gonzalez de Lara