Become a private person re dating especially around your JW family who are still in, same for JW friends and Elders. None can be trusted.
Let's start with what's immediately available....... The JW's who are in your life or in the religion at large. Your PIMO so you need to look for a person who is also PIMO.
Which type of JW should you consider:
A person who chronically shows up late for any meeting especially the Memorial and any Assembly. Also known to be absent from same........ more then usual. This would be good news.
You'll want an appealing looking person and not so modest that it's difficult to think of them as attractive.
Someone who Never talks about the WT meetings, jw.org, assemblies or JW's in person.
And Never references anything overly positive about anything in the JW world.
Make sure during the summer this person has a great tan and it looks like their body is in good shape....... indicating time spent in recreation and exercise........... Not knocking on doors.
A person who on vacation wouldn't dream of visiting a foreign KH.
If you hit it off you have the JW base in common especially if ridicule about the JW world is well received.
To go to your question about dating a a non JW:
You need to establish a base from which a relationship can grow. It's easy in the JW world because you hold the same beliefs or interests and meet regularly a couple of times a week or at an assembly. You qualify because you are a JW.
It is helpful to duplicate a close tie and common beliefs when dating a non JW.
You need to have a base line that permits getting to know one another. A Daily or weekly meeting is helpful.
A gym, running in a group, taking Karate lessons. The work place, a school classroom etc.
The best way to meet up is to be a volunteer. Good people volunteer. If you are looking for the right person, if you enjoy the satisfaction of helping those who need help and get to see how a 'person of interest' handles those responsibilities.......your learning curve really takes off.
You need to enter someone's life organically, the relationship must be given room to grow, common interests will be important. And a common disdain for all things JW will he helpful.