See your abilities
The word of God in Mark16:17-18 says: “And these signs shall follow them that believe; in my name shall they cast out devils; they shall speak with new tongues;
They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover”. I have found this scripture to be very enlightening, the Holy Spirit through this scripture made me realize the ability I received the moment I believed the gospel (what is called new birth). Let’s look at verse 15 and 16 of that same chapter; and he said unto them, Go ye into all the world, and preach the gospel to every creature. He that believeth and is baptized shall be saved; but he that believeth not shall be damned. After Jesus had risen from the dead, he visited his disciples and on His last visit to them while still on earth, He told them to go to all the world and preach the gospel, stating that if any man believed, he would be saved (salvation) and in verse 16 &17, He stated the signs (their abilities) that would follow them.
Therefore from these verses of scripture, it is clear that we received the ability for these signs the moment we were saved. Therefore know that the moment you believed (till forever) you have always been able to: speak with new tongues; take up serpents; drink any deadly thing and not get hurt; lay hands on the sick and have them recover (healed). It was automatic immediately you received Christ.