can't make him cum

hi everyone. me and my boyfriend haven't been together very long but I had my first real sexual experiences with him. he is more experienced than me btw. while I want to pleasure him with oral or my hand I feel insecure and don't really know what to do and how. last night I gave him a blow job but although he said he liked it, he did not cum. any tips how I can leave my shyness behind and giving him pleasure? is there a technic that will work for sure we feel both good about?