Dynamic heterogeneity (DH) is ubiquitous, from small-scale objects to large-scale celestial bodies. We explore DH, associated length scales, and structure in an athermal active glass former. An active athermal system implies an absence of an external heat bath which usually remains coupled with the active matter. Active matter systems have an internal energy depot and utilize their energy in various kinds of directed motion. By dynamical heterogeneity analysis, we explore the dynamical length scale from a four-point structure factor and also compare the trend of other microscopic length scales along with the dynamical length scale for various persistence times ($\tau_{p}$) and effective temperature ($T_{\text{eff}}$), which generally implies the strength of the active noise. We connect relaxation time with the length scale by effective chemical potential, the variation of which with $\tau_{p}$ dictates the energy cost for overcoming a barrier in structural relaxation. Later, we focus on the shape and morphology analysis of various clusters resulting from dynamical heterogeneity. We observe the fractal dimension variations of such clusters for various $\tau_{p}$ and dictate the morphology, whether it is compact or string-like. Also, in my talk, I will mention my intention to observe the iso-relaxation time measurements that might be crucial in characterising "the morphology of cooperatively rearranging regions.”