Looking for some advice/techniques on these words: F, V, T, D

Looking for some advice/techniques on these words: F, V, T, D I know I can go to a speech therapist but I just want to hear what other people do to overcome it. T/D: I just get completely blocked, like my tongue gets stuck on the roof of my mouth, like it got vacuumed I'm totally lost on what to do V/F: Even when I breath in fully and try to say it while breathing out, nothing comes of it, I just get stuck saying the F/V sounds for a prolong period of time . This is the best I can describe it in the current moment, I'm kind of sleepy.