Hello people, I am still a uni student doing business degree. So i have NO income but sometime getting around RM100 to RM200 a month by providing IT service support for office, which mean if im busy with assignment, i might not have any income for a month.

Others income: Birthday and CNY angpau: RM 2000 a year.

My fixed expenses in a month:
Phone Bill: RM 50
Petrol: RM 200+
Food: RM100+

My current cash: around 2000
Now i don't wish to earn more and a lot as I am still a student without job.
What i need is a proper expenses management. How do i record my transaction ? any software or templates for me ? and also what is the proper way of doing budgeting ?