During Simchas Bais HaSho'eva, Hillel said: אִם אֲנִי כַּאן הַכֹּל כַּאן If I am here, everything is here. The famous Anav, Hillel [who never got angry] should talk like this?
The Chovos Halvavos says that you can't be a true Anav unless you first have healthy esteem!! We can suggest that Hillel was teaching how a person can become a real Anav. Chazal say that when Hillel washed his face, he was in awe of himself since he was realized it was the face of a Tzelem Elokim. First believe in yourself, as Chazal say: חייב אָדָם לוֹמַר בִּשְׁבִילִי נִבְרָא הָעוֹלָם סנהדרין לז א A person is obligated say: The entire universe was created just for me. You have to constantly focus on the great qualities that you have, and appreciate the areas that you are strong in, more than anything else in the world.
What does the Yetzer Hara do? The Chesed-prone person is always jealous of the Masmid, and the Masmid wishes he would cover more ground in Gemara, etc.
Being happy with your “concern” to do your best, is precious without end. If you become negative about yourself easily, it is a Mitzva to go to the extreme opposite by seeing only good. This is considered Shviras HaMiddos, with loads of reward for that person. You always need a Rebbe or a close friend to guide you.