I do kinda feel for you though. I remember on my first play through very well, those damn mantises kicked my ass in a random encounter I saved at, making me restart and try a different character. Just know that once you figure out the combat and how to build a good character (not as hard as it seems once you know what skills to rage on and what to ignore) you will go far. Just follow Lexx's advice and raise small guns as quickly as possible, big guns/energy weapons don't come into play until you're about 60% through the game and melee/unarmed are way too difficult unless you've been playing for a while(and even then, you need a good small gun skill for when you can't/dont want to chase down an npc) Then focus on both speech and lockpick evenly until about 80 and by that time you should have a good sense of what you want to do from there. And don't forget to turn combat difficulty to easy in the options menu, I forgot exactly what it does but I believe it raises the damage you do, lowers the damage done to you, and raises the chance for critical shots. Don't quote me on that though
Do not play with a super character, whatever you do. A lot of how the story progresses is based on how your character is built which adds a huge amount of replay to the game. If you cheat you're taking a game you can happily play 15 times and get a new experience each time and shortening that to two or three at the most before it gets boring