The International Astronomical Union Women in Astronomy (IAU WiA) working group (WG) is a part of the IAU Executive Committee that supports the needs and endeavours of women astronomers and initiates actions to advance equality of opportunity for women and men in astronomy. The new organizing committee of the IAU WiA WG was set-up in August 2021 with a 4-point plan, to enhance (i) awareness & sustainability via surveys, (ii) training and skill building, (iii) fundraising & (iv) communication via dissemination of results in conferences, WG Magazines, newsletters, etc. to facilitate the career of women in astronomy. In this publication we provide an overview of IAU WiA WG activities with a special focus on the Training and Skill Building efforts that can be adapted for differently-abled and marginalised women researchers.