How to pace myself drinking

Hi all! I had a couple questions about wine tasting.

It’s my first time wine tasting. I wanted to know how to pace myself because I don’t want to be the only one drunk. I am tiny so I have kind of a low tolerance. I know to drink water in between and to make sure I eat.

But how do I pace myself when I am going with a group of big drinkers? I don’t want to be embarrassed because I can’t drink at the same pace as them. I also don’t want to spit. I don’t mind taking a sip and then dumping the rest of I don’t like it. I am thinking I will take small sips but I don’t want anyone to mention I haven’t drank as much as them.

I am the youngest of the group (22) and don’t want to be seen as a baby or that I can’t keep up. I don’t want to get drunk as I have been emotional the last couple times I have gotten drunk. I want to enjoy the day. How can I not be embarrassed or pressured to drink more? We are going with varying ages (oldest mid 50’s).

Can anyone offer advice? After wine tasting we are going out with some of the younger people in the group and I don’t want to get drunk halfway through the day and then be too drunk by night.