Unfortunately, with the situation we are in now, with lockdowns and covid19, most centres are closed or not functioning at full capacity. Most have turned to online programs.
If you live in an area where physical attendance is allowed, try your best to be present in those gathering and share together your state of mourning with other believers.
If you are in a place where you are restricted, then your only option is to attend a program online, and try to interact as much as possible. You can also create a positive spiritual atmosphere at home as well, so people in the house feel the sadness of Muharram and Safar.
Find alternative ways to serve your Imam (a.s.), and keep the 'azaa culture alive. Cook, and share food with your neighbours, wear black, etc...
All these things, in shaa Allah, will assist us in our ma'rifah towards the Imam (a.s.), and will please them.
With prayers for your success.