I don't know what program you are using but in the past when I had to do virtual titration labs the steps were as fallows:
1. Choose what type titration you are doing (usually base into acid where base is the titrant and acid is the analyte)
2. Decide what type of titrant you want and what concentration you want it at. (usually NaOH or any other strong base)
3. Decide what type of analyte you want. (usually some sort of strong or weak acid)
4. Choose the indicator you want to use. (the most common indicator is Phenolphthalein)
5. Add titrant to the analyte (base into acid) until a color change happens and record the volume of titrant used.
6. Use the fact that [titrant]*volume =moles of titrant used ([titrant]=molarity of titrant and volume is the volume from step 5)
7. find the number of moles of analyte consumed by multiplying the moles of titrant found in step 6 by the molar ratio of how the titrant and analyte react. (usually this ratio is 1 meaning 1mol of titrant will react with 1mol of analyte but it can be different)
8. Now that you know the moles of analyte in the solution you can find the concentration of the analyte by dividing what you got in step 7 by the volume of analyte you used.
It is sort of hard explaining what to do without knowing what kind of titration you are doing and what the analyte and titrant is but these are general steps that should work for what ever you are doing.
I hope this helps. Let me know if you have any further questions or need anything to be clarified.