Hey PeteZero,
first of: try to get rid of the number-crunching-thinking which often takes place in MMO(RPG)s or highly simulative rpgames. SW EotE is after all a very narrative roleplaying game, although it is loaded with many rules. But the nice thing about it is: it finally boils down to what dice-pools you have in a given situation and how you (narratively) resolve the dice-results. Now as for your (more specific) questions:
Maybe put it another way, is melee worth it in EotE? And build a backstory on such kind of PC? Or is it mainly ranged (heavy or light doesn't matter) and spend my creativity (whcih needs to resurface) on such a kind of PC? Or does it not really matter, as you will get everything, melee and ranged combat. And on top, how important is piloting and technical skills? Usually you could neglect all kind of skills, but might be different in EtoE.
1. You will never be able to assess melee as worth or as not worth it. This really, really, really depends on all the situations you play during the game-sessions. If your gaming group decides to remain in long-range combat as much as possible, melee is a waste; but melee is especially true if it comes to many, many close-combat arrangements. But truth about both is: neither way of playing is representative for SW EotE, since both types of combat should be common - just compare it with the movies of SW Episodes IV through VI.Very often both combat types go hand in hand, since some characters use their guns, while others brawl like crazy. I happen to envision the incredible action scene on Tatooine on this flying party-boat of Jabba du Hutt, when Luke, Han, Chewie, and many more fight all the villains around Jabba in order to avoid being tossed into this huge mouth in the ground ...
2. Piloting and technical skills ... How important are those? Well ... This again depends on the gaming group. Piloting is important, if you will face troublesome vehicle- or space-flight-situations on a regular basis. And technical skills will help you a lot in many situations which are based on complications. But here is the thing: If you don't have ranks in the given skills, you may never the less try to solve the situation with your characteristics. Unlike many other roleplaying games the skills in SW EotE are usable anytime -regardless if your character has or has not "learned" a skill by putting ranks into it.
3. Having said that! In my opinion: in the beginning you are well advised to choose some kind of orienteering for your character: If you try to cover as much different fields of expertize, you won't be able to be good in anything; but don't make the mistake to focus only one one thing. Maybe you should consider all the skills and sort them by the characteristics each one (generally) is tied to. Then compare this with your "initial" idea what type of character you want to play - is it the Chewbacca-kind - so a technician and brawler? Or is it more kind of a zen-monk, or the bodyguard, or something like "Beastman" from the X-Men? You have plenty of opportunities here.
4. Keep in mind that you will earn XP sooner than later; and this will allow you to develop your character, which includes the great opportunity to learn things which you have thought of during the character creation, but for which you did not have the proper amount of building-resources in the beginning. SW EotE provides a very solid and elegant means of character development. But the important thing here is: You won't start with a "finished" and "fleshed-out" character - under no circumstances.
Best wishes!
Mad