I need help insulating my attic.
+1
The upstairs stays hot during spring and summer. Can’t afford to hire someone 
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Where do u live!? Lol
Check local building codes first, then determine how much is existing so you know what to purchase. Then explore your options as to cost and how to install.
Here's a link with some interesting information to consider when deciding what type and how to insulate your attic. I hope it is helpful. Doing it yourself can save you and sometimes it is as much as only 1/3 the cost of hiring someone. https://www.thisoldhouse.com/ideas/read-you-insulate-your-attic
This may help: https://www.energystar.gov/index.cfm?c=diy.diy_attic_insulation