Welcome to Talk Budgies!
It really is wonderful to see your initiative in taking care of your bird's diet.
The easiest transition pellet brand I've personally heard and experienced myself is ZuPreem Fruitblend pellets, the Canary size ones as those are better for budgie beaks.
These have bright colors, and although the colors may not be all that desirable in a diet, to the birds it's more fun to eat things that are pretty
I recommend these.
Randy has a great idea as well with the Nutriberries, eventually it all comes down to the individual bird.
I transitioned my little girl onto pellets by gradually integrating them into her seeds, and although she didn't eat any after she ate all the seeds, it was mainly just to get her used to the idea that the pellets existed. Eventually, she'd finish off all the seeds in the bowl within a few hours, and would be begging for more, but I would make sure to not give in to her begging and she eventually ate some after she realized that she would be hungry throughout the day unless she ate them. After she started eating them (you can tell when this happens because their poop changes colors...
) then I completely cut seeds for a week or two so she became accustomed to a mainly pellet diet, and after that period of time, I integrated seeds back in. It's now at a steady ratio of 20-25% seed and 75-80% pellets
Good luck with the transition, and don't give up on the veggies! It takes some birds forever
to try a bite, and even though it's frustrating, eventually curiosity will get the better of them.
It's lovely to have you with us and I hope to see some pictures of the little rascals soon!