I agree that it will be hard for you to achieve that real trumpet sound however with the right tools you can come close.

You said that you play some piano so if you have or get a MIDI keyboard controller you can add either an expression pedal or a breath controller. That will help you get a more realistic sounding trumpet. Both would be used to control CC11 which means more volume control.

You can control a few more CCs with an Akai wind controller:

https://www.bhphotovideo.com/c/product/589255-REG/Akai_EWI_USB_EWI_USB_Wind_Instrument.html

It can be set to a trumpet like fingering.It takes a little time to master but it can make a VSTi sound more realistic. I use it for all of my brass and woodwind sounds as well as many others. I was a trumpet player and the fingering is just like a trumpet so all you have to really learn is the octave rollers.

I have no experience with Trumpet 3 but I do have and like the Screaming Trumpet:

https://realitone.com/products/screaming-trumpet

but it needs the full Kontakt version; it will not work in the player.

I hope this helps.

I want my last spoken words to be "I hid a million dollars under the........................"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware