I really should've clarified it in my previous post...

Anyways, I am using my camera's built in pop-up flash, and my iphone's torch is on the entire time so its projecting continuous lighting on the subject.

And the reason I chose 200mm is because if I were to use 80mm that would mean my subject will look very far away and my A4 paper backdrop won't be big enough to cover everything behind it since I have some distance with the subject.

Maybe in hindsight I really should've just used a faster shutter speed and cranked the ISO a little bit 

I'll go over to my local stationery store this weekend and buy myself some materials so I can setup my own light box sort of thing.
I still don't have a tripod yet so I was already risking my photo sharpness for low ISO and slow shutter speed now... thats the next on my to-buy-list.

Also how does it work as a optical trigger tho?    That sounds expensive

I'll try with diffusing my phone's torch first, do you think I should have the entire room blacked out when I'm shooting tho?
The rule where your shutterspeed should be almost the same as your focal length? Maybe I'll try it out.
also as much as I'd love to have image stabilization, this lens and body combo doesn't come with that feature lol

And my hand was shaky as hell that I had to use the backrest of my chair as a support, and you have no idea how many ruined shots were flushed down the toilet thanks to my shaky hands   

Thanks, I have your number saved but not now, I'll make sure to have tried everything you have mentioned in your previous posts first and I'll reach out to you whenever I run into any hiccups trying to setup my makeshift studio.
Me being a massive cheapskate, I'll probably end up building my own lightbox with a massive cardboard box and some leftover white fabrics.
But thanks for the advice as well, maybe I'll shop around for a prebuilt one before actually going full DIY mode.