I'm perfectly capable; I just need to focus.

Meaning

I'm able to do this; I just need concentration.

Examples

• John: You look stressed. Need some help with that project?
• Alice: Thanks, but no. <b>I'm perfectly capable; I just need to focus</b>.
• John: Okay, just let me know if you change your mind.
• Alice: Will do. Honestly, <b>I'm perfectly capable; I just need to focus</b> and get it done.