If one does not know the full procedure for Tiruvaradhanam performed for Saligrama Perumal, can we offer Arghyam, Padyam, Achamanam, Thirumanjanam, Chandanam, Pushpam, Dhoopam, Deepam, Thaligai, and Aarathi?

If you are not familiar with Tiruvaradhanam, you can offer these Shodasa Upacharas (sixteen offerings), but you must learn and perform them completely. Doing it this way is only a temporary measure. You should not keep saying your whole life that you do not know Tiruvaradhanam and continue doing only this. Since one should not eat without offering food (Nivedanam) to Perumal, you must learn Tiruvaradhanam within a week. All these Shodasa Upacharas are only temporary.