Hey bro,
Firstly what's your stats? height, weight?
Like you I'm also medium-short for my weight class (Cruiser Weight), you seem even shorter.
From looking at you I wouldn't suggest the Tyson approach, Peekaboo really only pays off if you have that one punch concussive power because the dips and bobs to pull that style off properly can be quite exhausting over a long period so unless you have real KO power the pay off for the clean shots won't be the same.
Firstly stop trying to box through the middle, your lacking height and reach, a good boxer is going to just jab you down the middle or just step back and catch you coming in.
There two things I would suggest you try depending on what would suit you and the way you box .........
A) If you prefer to box and counter watch Montell Griffin, he uses a right hand catch and gives you the shoulder and dips / leans back, this forces taller opponents to come down to you rather than you go up, when they do you can use the check hook or just dip then come up off your back leg and get your shots in.
B) For a more aggressive approach if your strong for your weight class I would suggest a Cross arm guard or Philly shell (This is what I use) a lot more economical than Peekaboo but allows you to avoid boxing down the middle, get on the inside then unload.
Use those guards to walk your opponent down, pressure them, then beat them down with hooks.
Cross Arm guard is easier to use, Philly shell's shoulder rolls take some practice and your less mobile.
