There are different types of loan and for each type of loans you need some sort of collateral to show to pay it back.
For example, when it comes to home loan, person needs to have either business or job in order to qualify for the loan. You need minimum 3 years of IT return and sufficient salary and savings to show the bank that you can pay the loan back.
Vehicle loans are on the basis of the salary and the savings. Some finance companies give loan on basis of salary slips only. And if not paid they take the vehicle away from you.
In case of loans for objects that makes money for you for example machinery, computers, electronics, you need to apply for business loan. In order to get this loan you again need collateral to show. If you are not working for any company then it'd be hard to ask for such loan. Also you don't have Pvt ltd or LLP company which makes asking for business loan even harder.
My suggestion: Work for some company and save the salary in recurring deposit. And after it reaches the threshold for computer purchase amount, go ahead and purchase the machine.
Another option: Get loan from people you know and pay them back. Or use the computer of friend, earn some money from the projects or the way you normally earn. And then purchase the computer from that earning.
Unfortunately no bank or person gives the loan unless he or the organization see some collateral in case if you failed to pay them back.