Behavioral issue of child. Do i do it?

Hi...I need help from Experts as much as possible.. my son is 2yr 2mo old. he is very very very clingy towards me. to an extent that it becomes impossible for anyone else in the family to handle/ keep him and for me to go out of home even for 5 minutes. we stay in a nuclear setup. his dad is working in a pvt organization in a senior role, so he is not able to spend much time with the little one. so it is me he sees morning and night everyday. and he is still breastfeeding. the place I stay , he doesn't get much of outdoor exposure with or without me.  it is a semi rural area with not much facilities around. but then there is a playgroup nearby and I am keen to get him enrolled there. his father, seeing all this crankiness, feels he is not ready for school yet. it becomes very difficult for me to tackle everything. he doesn't go to anyone, even his father for more than 5 minutes. it is taking a toll on my mental being, relationships, priorities, everything. how do I do it?