Can I interact with Minecraft Java and MinecraftPE and if not what can I do then?
No, unfortunately not.
No, that will not work. But if you both buy the "Microsoft" Minecraft version, both on the smartphone and on the PC, you can play together.
No. But if you have Windows10, you can get the Bedrock Edition. You can do it. Maybe you made your Java account before the release of Bedrock Edition. Then you can even get this for free on the Mojang website