Gym after covid. Tmt all were very fine.

Hi all my age is 28yrs , In 2021 I got covid and I recovered within a month but after that I faced many issues like anxiety palpitations indigestion post nasal blockage but gradually I recovered well from all of these issues but still sometimes I am facing palpitations issue when I lift heavy objects and doing heavy work like that. So here my question is due to anxiety issues I got obsese and now I want to join Gym but am getting fear to go for Gym as many people not recommending to go as it causing heart attacks and cardiac arrest issues for many covid patients.so can I go for Gym or doing walk is better recommend for me please suggest and advise for me. Note: due to these doubts of my heart condition I tested for ecg for many times , 2d echo,TMT all were very fine .