As long as yoga is not part of your daily routine like brushing your teeth, it is common that you "fall out of" your practice. Then comes the time where you tell yourself "I should really do yoga again", then you ignore this voice for a while and then you might tell yourself "but my yoga teacher is away, I have to wait for her to come back" etc.
But really it can be easy to start. First let's look at what yoga means. The Sanskrit definition of yoga means "union" or "connection". Yoga is a state of conscious connection and offers also techniques that allow us to connect to anything. Each yoga path specialises in its own techniques and methods to awaken greater awareness and connection to self and life.
There are many tradtionial yoga paths. Yoga practices include posture (asana), breathing (pranayama),deep relaxation (yoga nidra), visualisations, chanting of mantras and many forms of mediation. And no matter if you choose one of those practises or a combination of a few - the secret or the key of yoga is always AWARENESS. So it can be just observing your breath at any moment during the day, listen to the sounds around you, making really eye contact with the person who speaks to you and being fully present or getting up from your chair and do some yoga practices in terms of postures as shown below. And again: these practices need to be done with awareness and to seen as exercises. Being aware when practising asanas means to connect and feel the body part that you move as well as observing your breath and mental movements - and have fun with it.
This is an "amateur clip" - still I hope you enjoy it and do the practices with awareness and a smile on your face ;-)