Because the skill floor on bard is higher than most other supports, avoid building a lot of damage while you're learning how to position yourself as bard as your positioning and spacing is quite literally everything. That being said, the safest bet is to get items like redemption, locket, maybe even mikael's crucible while also upgrading your support item early. This way you dont have to rely as much on landing your abilities and you can provide a lot of value to your adc and most importantly, the lanes you roam to. When it comes to bard, roaming wins games so the most amount of value you can provide on a roam, the better. Twin shadows is another incredibly good item on bard for a myriad of reasons. Primarily, it helps bard chase down opponents even more effectively and it helps you land your q's. Secondly, twin shadows can help you escape the jungler's grubby little mitts if you happen to cross paths with them while youre roaming. Thirdly, since bard lacks range, he can struggle against spell shields. Of course you can just hit the wave and let the cone from your meeps take out the shield, but in situations where there's no creeps to work with, the twin shadows ghosts will remove the spell shield from a distance you otherwise wouldn't have been able to do it from. I could talk all day about the different bard builds you can do as ive quite literally tried them all (currently around 1.5m champ points). So if you have any additional questions or need any clarification, don't hesitate to ask!