[NSFW] Learning to bottom ... need help.

Made out with a guy for the first time and loved it. So the natural progression would lead to ... sex. But I've never done it with a guy before.So using a household object and lotion, I've made a makeshift dildo to prepare/practice.Five questions:Is practicing a good idea?What are some good real dildos/lubes/edema bottles?Almost exactly 4 inches in, I feel like I've hit a wall. Do I need to re-angle it? What is going on? Is this the "S"? What do?Getting it in my butt isn't much of a problem; however, when I try to move it in and out ... it's pretty much unbearable. Help?The "out" motion REALLY feels like I'm about to #2, even though it never happens. Is this normal and do I just need to get over it?