Welcome to the forum! Looking at the eyes of your beautiful BF..they are still dark in color which to me means he/she is still a young bird.
I recall when I picked up Amy <Amos?? lol :54:> she was just 16 weeks old and had the same eye coloring. As they mature the eyes turn a lighter brownish/red.
As far as food/seed/sunflowers go..Amy does get a bowl of mixed seed <I know,my bad

> She was actually eating pellets when I got her,but because my Timneh refused pellets and at seed,poor Amy got seed too.
However,she eats EVERYTHING else..all veggies,fruits,pasta,chicken leg bones,anything Arllen and I eat,she gets to sample. Now at 26 yrs old,she hardly touches her seed bowl,because she gets an ample supply of good stuff.
When I had Smokey,the Grey,who would NOT TOUCH good stuff,she would cower in the corner of her house and growl like a pack of mad dogs,when Smokes saw Amy eating good things,she prolly thought to herself " gee,whats this new green bird eating? and started to taste test different things. It turned out she realized what she was missing,and started to eat everything in sight,thanks to Amy.
Try not to encourage your new friend to eat seed. Try pellets if you can get them,and try all sorts of veggies and fruits,and stuff you eat. Being in new surroundings he/she is still settling in,and at least is eating some stuff.
Keep us posted!
Jim