Absolutely take the time to reach out to current students, alumni, and faculty members affiliated with the grad programs of consideration. Your grad school experience will very much be influenced by the people you are surrounded by during your education and the culture of the program. Hearing from other's experiences and talking to current students is one of the best ways to find the right fit for you.
Smart or slow, doesn't really matter in the end, the point is everyone has their own time zone, all you have to have is your own balance of work, play, and all other stuff, the others don't really matter.
Pursue research that you truly believe has the potential to improve life. Knowing you are working toward something more than just a degree can help you find the drive to make it through the difficult or dry aspects of your time in graduate studies.
Your time in graduate studies will provide many opportunities, but don't lose touch with yourself. Take the time to do what you need to in order to maintain your sense of purpose and direction, then live out of that. Don't be afraid to try new things, but remember that no one can do everything. Be selective.
Undergraduate research opportunities come highly recommended as they offer individuals a direct glimpse into the world of research and academia, allowing them to evaluate their own inclinations towards this field. Pursuing a PhD is not a path suited for everyone. A fourth-year project can serve as a litmus test to determine if this path aligns with one's aspirations. If it doesn't, one can easily leave without further commitment. However, if it resonates, exploring the possibility of joining a research group that fosters a strong connection becomes crucial. While enjoying the research itself is important, equally important is finding enjoyment in the people one works with, particularly their principal investigator.
To any undergraduate student that wants to pursue graduate school, my best advice would be to study hard, celebrate your academic victories, and don't get caught up on your failures. Everybody has a story of a course they wish they did better in, or a midterm/exam that was an unexpected curveball, but as long as you learn from your past and keep pushing forward, things will work out for the better.
Remember that research never goes as planned and to not let failed experiments or unwanted results keep you from working hard on your degree. No one gets through graduate school without failed experiments and huge changes in their project plans.
I would tell any prospective grad students to visit the campuses they are applying to, and talk to students in their program(s) of interest! A major factor in my staying at Guelph was the campus community, and knowing that I would be supported throughout my studies in not only my academics, but also through the social atmosphere on campus.
I feel lucky to have been able to be involved in many different projects at the University of Guelph. My advice to future grad students is to get involved in as many different things as you can and to not be afraid to reach out to people. A lot of the fun in a graduate degree is being able to collaborate and work with lots of different people.