Welcome to the forum!
No it’s not, but no big deal; it’s your first character and you had fun 
I can answer your questions but first; unfortunately S&B auto attack builds doesn’t result well except physical damage in this game. There are a few but; with your class combination(Shieldbreaker) you have a lot of options. Some of them includes Shield. So what you wanna do exactly? You can use Dual Wield Melee with FS; which is good and have weapons should be easier to obtain. You can play 2H but then Righteous Fervor might result better than Fire Strike. You can play caster(which is not my area btw) with BWC, Grenado, Canistor Bomb etc.
But in all of these options; you definitely need Thermite Mine and Celestial Presence to reduce enemies resistances. You also take Solael’s Witchblade on devotions for the same reason. The easiest way to increase damage is reducing the enemies’ resistances. Also if you wanna be an auto attacker, you need more lifesteal along with more damage. One hand weapon + shield doesn’t provide that much damage but there are alternatives like shield throwing, though Paladin is much better for that kind of build.
Information about Resistance Reduce mechanics.
I can guide you for some of these paths but you need to understand what exactly you want from the build. As far as I understand, you wanna hit with your weapon; so I’m leaving these DW Melee builds and a beginner Shieldbreaker guide;
Edit: Here a quick theorycraft for you. https://www.grimtools.com/calc/vNQy4PEN Just a sketch, not ideal but just to show you it can be done with budget items. Some items are target farmable, so check them in grimtools and try to get with good rolls so you can improve your build.
General suggestions: Keep your resistances %80 and have atleast %15-20 overcaps of them.(you can use augments) Physical resistance is also important, ideal is having atleast %15-20 or so if you have less, use items that grants you that stats since getting them from devotions is harder. Armor and Armor Absorption are tied together and have a unique mechanic, try to some reasearch in forum and google some of the things you wonder. Keep playing and don’t afraid to fail, that’s how you learn things.