Coming from penetration alone is tough. Usually some clit needs to also be involved. Penetration with g-spot is best way to try but don't get hung up if you can't. My wife says her penetration Os feel different then clit ones. Laying off sex does make sexual urges stronger so your excitement is higher. So many factors play in, experience, his stamina, how excited you are.
On oral my best tip is combination of sensations on both clit with tongue and finger inside her (g-spot or spreading vag walls) at same time.