Accrual accounting question, write a few sentences please help: You've agreed to help your brother prepare financial statements for the first six

Accrual accounting question, write a few sentences please help: 

You've agreed to help your brother prepare financial statements for the first six months for his new computer repair business. All he has is bank statements detailing cash collections and cash payments during the year and some invoices for equipment and supplies purchased during the year including a record of services provided to customer including dates and amounts billed.  Where would you begin to make sense of this mess and what steps would you take to provide him a set of financial statements using accrual accounting?