Am good with data collection and field supervision, where and how can i get training in data analysis and good quality report writing?

You can take a start from online MOOCs and choose your own pace and price (free, until you plan to earn a certificate). 

Start with selecting your most comfortable tool, let it be Excel, SAS, R or Python. Then you can search courses at Udemy, Udacity, Coursera or EdX. There's a website called coursetalk DOT com where you can review among many courses.