Help with a Genetic algorithm?

Hello, I am new to Genetic Algorithms and I would like to start making one. What my algorithm should be is a multi-objective optimization to optimize routes and times for buses for my university. The outcome of the algorithm should be the starting time and route of each bus, meaning the buses should arrive at uni by 9:00 AM. The given data is: • Number of buses. • Bus capacity (each bus has a max capacity of 35 people). • Total number of students (Number of students < Total bus capacity, about 80~85% of total bus capacity). • Each bus has a starting point. • Each bus has a stop point. • Number of students at each stop. • Time at destination.

And the penalties are:

1. Overlapped bus stop 2. Minimize overall travelling time 3. Missed bus stops 4. Late buses penalty 5. Penalty for exceeding bus capacity

Any help or tips? I would like to know how generate one, starting from the fitness function. TIA