To be professional In Marketing , which training do you advice to take? even if its a video training

Marketing is a large profession with many functions. Choose which function pleases you before going through trainings.

For example, creative and content marketing has different skill set and trainings then channel and retail marketing. 

To be a good marketer,I would recommend the following training

1. Managing people to get the best result, because the greatest asset is human resources

2. Training on sales management, including forecating

3. Monitoring, observation and data collection