Before anything, i need to tell you that this is my first build EVER. Later(when i get more experience in making this stuff) i will update it.
I PAY ATTENTION TO ANY SUGGESTION AND COMMENT SO PLEASE DONT RESTRAIN YOURSELVES.
I dont want to get you bored by a dicionary-long "guide" so all the needed things about masteries items etc are in the note sections.

Every bard player should know abot the Q-basic-meep combothat works perfectly with tunderlord. You didn'y? Now you do.
There are not too many bard players so your teammates might not know your abilities(especially about the bonus health given by W if he waits long enough).Explain them what you are capable of
Watch out for poisons,ignites or other life reducing buffs applied on your team and use your R to stop them
If you get chimes near yout lane, dont take them dirrectly. Place an altar, land a Q, open a portal consume mana before taking it. When you are collecting, don't be afraid to use E, as you receive more mana than you consume. You can as well heal yourself as the bonus speed from the chime remains.
Help mid when you have the opportunity. You are fast enough and you should have R