For ATOW, even if using the Points Buy system to build the character use the life paths as a guideline to give some idea toward skills especially necessary skills for the professional fields.
One of the games I was involved in many years ago, more than half the PCs who were MWs showed up at the table with no skill in Sensor Operations.
You also may want to sit down and run a few practice combat rounds just to become familiar with and work through it. If the players are involved, it will help showcase how lethal it can get especially if you don't use cover or wear armor.
Character generation gets easier with familiarity and skill resolution may feel clunky but it does smooth out with experience. I love the system and plan to get back to it soon now that things are returning to normal.
What are your questions with Destiny as well?