drop downs to show

HI there,
I hope everyone is well.
A simple thing (I thought):
(I’m a photographer and part of my income is shooting models, I can’t provide a link or the ladies will damage me!)
I have two pods model_records which is HR table storing things like name, phone email and ID photo.
Second pod is modelshoot and is a record of each time I work with a model. It has three fields: shootmodel (models name, related to model_records to produce a drop down), shootdate and shootgallery.
The third pod is a summary with two fields: summaryname(dropdown generated from modelshoot) & shootdate (dropdown generated from shootmodel)
It then shows related details for the relative model and shoot details via a template “Model Summary Template”
All of which work a treat BUT I can’t figure out how to have the input dropdowns AND the results on the same screen – there must be a simple answer (pop-up?) I can’t figure it out.
The very basic template:

<h1>Model Name: {@summaryname.model_name}<br> <img src="{@summaryname.model_photo._src}" align="right">
Phone: {@summaryname.model_phone}<br>
E-Mail: {@summaryname.model_email}<br><br><br><br><br>
Shoot Details:<br>
Date: {@summaryshootdates.shootdate}</h1><br>
{@summaryshootdates.shootgallery}