Creating a Custom Oracle Java Cloud Service Instance on Oracle Cloud Infrastructure Classic

i have to do all this as the revenue in ireland wants all there work done through javascript, it just looks like a complete nightmare to me i do not understand any of it it is for all payroll for employers and employee to do with all the wages and te deductions also the VAT and all that goes with that when i have used some of it i will be better able to give a review thanks Pauline