Stuck in launching process means you have to download Java 64 bit offline here: https://java.com/en/download/manual.jsp
Even if you have Java, this is the only way technic will allow you to add more ram.
4+ GB recommended.
If you dont wanna read the messages for commands in questing, disable command block output with the vanilla command. A mod doing this by default is intended to be implemeneted in next version.