INDIGO - Online booking system

Greetings, I want to have an online booking application which can be easily accessed anywhere by the users. We initially had a booking system on Google Sheet which was manual then we shifted to some sort of VB Studio program which turned out to be a bit poor and lagged a lot. I will attach our current booking system and you can check it. Since we want an online system, we expect that more features can be added to it. We need someone who can collaborate on it and help us establish a safe system. I will be happy to see all the different suggestions you have! Apart from that, I will be glad to have a Zoom Call to explain any further details!